221001221020111 has 8 divisors (see below), whose sum is σ = 252576483513120. Its totient is φ = 189426873399648.

The previous prime is 221001221020109. The next prime is 221001221020123. The reversal of 221001221020111 is 111020122100122.

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 221001221020111 - 2¹ = 221001221020109 is a prime.

It is a super-2 number, since 2×221001221020111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001221023111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228200416 + ... + 229166821.

It is an arithmetic number, because the mean of its divisors is an integer number (31572060439140).

Almost surely, 2^{221001221020111} is an apocalyptic number.

221001221020111 is a deficient number, since it is larger than the sum of its proper divisors (31575262493009).

221001221020111 is an equidigital number, since it uses as much as digits as its factorization.

221001221020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457436273.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221001221020111 its reverse (111020122100122), we get a palindrome (332021343120233).

The spelling of 221001221020111 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, twenty thousand, one hundred eleven".