23113221021 has 32 divisors (see below), whose sum is σ = 37363175040. Its totient is φ = 14004835200.

The previous prime is 23113221017. The next prime is 23113221049. The reversal of 23113221021 is 12012231132.

23113221021 is a `hidden beast` number, since 2 + 311 + 322 + 10 + 21 = 666.

It is not a de Polignac number, because 23113221021 - 2² = 23113221017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23113220985 and 23113221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23113221011) 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 31 ways as a sum of consecutive naturals, for example, 2526171 + ... + 2535303.

It is an arithmetic number, because the mean of its divisors is an integer number (1167599220).

Almost surely, 2^23113221021 is an apocalyptic number.

It is an amenable number.

23113221021 is a deficient number, since it is larger than the sum of its proper divisors (14249954019).

23113221021 is a wasteful number, since it uses less digits than its factorization.

23113221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17674 (or 17668 counting only the distinct ones).

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

Adding to 23113221021 its reverse (12012231132), we get a palindrome (35125452153).

The spelling of 23113221021 in words is "twenty-three billion, one hundred thirteen million, two hundred twenty-one thousand, twenty-one".