23113311221 has 48 divisors (see below), whose sum is σ = 31907232000. Its totient is φ = 16624571040.

The previous prime is 23113311217. The next prime is 23113311229. The reversal of 23113311221 is 12211331132.

It is a happy number.

It is not a de Polignac number, because 23113311221 - 2² = 23113311217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23113311193 and 23113311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23113311229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 518120 + ... + 560958.

It is an arithmetic number, because the mean of its divisors is an integer number (664734000).

Almost surely, 2^23113311221 is an apocalyptic number.

It is an amenable number.

23113311221 is a deficient number, since it is larger than the sum of its proper divisors (8793920779).

23113311221 is a wasteful number, since it uses less digits than its factorization.

23113311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42895 (or 42870 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 23113311221 its reverse (12211331132), we get a palindrome (35324642353).

The spelling of 23113311221 in words is "twenty-three billion, one hundred thirteen million, three hundred eleven thousand, two hundred twenty-one".