221533612110245 has 8 divisors (see below), whose sum is σ = 265840528510584. Its totient is φ = 177226760369344.

The previous prime is 221533612110241. The next prime is 221533612110253. The reversal of 221533612110245 is 542011216335122.

It can be written as a sum of positive squares in 4 ways, for example, as 100135539364 + 221433476570881 = 316442^2 + 14880641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221533612110245 - 2² = 221533612110241 is a prime.

It is a super-2 number, since 2×221533612110245² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221533612110199 and 221533612110208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221533612110241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8277434 + ... + 22618203.

It is an arithmetic number, because the mean of its divisors is an integer number (33230066063823).

Almost surely, 2^{221533612110245} is an apocalyptic number.

It is an amenable number.

221533612110245 is a deficient number, since it is larger than the sum of its proper divisors (44306916400339).

221533612110245 is a wasteful number, since it uses less digits than its factorization.

221533612110245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32329719.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 221533612110245 its reverse (542011216335122), we get a palindrome (763544828445367).

The spelling of 221533612110245 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred twelve million, one hundred ten thousand, two hundred forty-five".