23110213221 has 8 divisors (see below), whose sum is σ = 34237352960. Its totient is φ = 15406808796.

The previous prime is 23110213177. The next prime is 23110213307. The reversal of 23110213221 is 12231201132.

23110213221 is a `hidden beast` number, since 231 + 1 + 0 + 213 + 221 = 666.

It is not a de Polignac number, because 23110213221 - 2³⁴ = 5930344037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23110213194 and 23110213203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23110213921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427966885 + ... + 427966938.

It is an arithmetic number, because the mean of its divisors is an integer number (4279669120).

Almost surely, 2^23110213221 is an apocalyptic number.

It is an amenable number.

23110213221 is a deficient number, since it is larger than the sum of its proper divisors (11127139739).

23110213221 is an equidigital number, since it uses as much as digits as its factorization.

23110213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855933832 (or 855933826 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23110213221 its reverse (12231201132), we get a palindrome (35341414353).

The spelling of 23110213221 in words is "twenty-three billion, one hundred ten million, two hundred thirteen thousand, two hundred twenty-one".