2210123221 has 4 divisors (see below), whose sum is σ = 2231580832. Its totient is φ = 2188665612.

The previous prime is 2210123219. The next prime is 2210123231. The reversal of 2210123221 is 1223210122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2210123221 - 2¹ = 2210123219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210123195 and 2210123204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210123231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10728651 + ... + 10728856.

It is an arithmetic number, because the mean of its divisors is an integer number (557895208).

Almost surely, 2^2210123221 is an apocalyptic number.

It is an amenable number.

2210123221 is a deficient number, since it is larger than the sum of its proper divisors (21457611).

2210123221 is a wasteful number, since it uses less digits than its factorization.

2210123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21457610.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2210123221 is about 47011.9476409987. The cubic root of 2210123221 is about 1302.5832698141.

Adding to 2210123221 its reverse (1223210122), we get a palindrome (3433333343).

The spelling of 2210123221 in words is "two billion, two hundred ten million, one hundred twenty-three thousand, two hundred twenty-one".