23013313121 has 4 divisors (see below), whose sum is σ = 23037874692. Its totient is φ = 22988751552.

The previous prime is 23013313091. The next prime is 23013313157. The reversal of 23013313121 is 12131331032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1685923600 + 21327389521 = 41060^2 + 146039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23013313121 is a prime.

It is a super-2 number, since 2×23013313121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23013313093 and 23013313102.

It is not an unprimeable number, because it can be changed into a prime (23013310121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12279380 + ... + 12281253.

It is an arithmetic number, because the mean of its divisors is an integer number (5759468673).

Almost surely, 2^23013313121 is an apocalyptic number.

It is an amenable number.

23013313121 is a deficient number, since it is larger than the sum of its proper divisors (24561571).

23013313121 is an equidigital number, since it uses as much as digits as its factorization.

23013313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24561570.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 23013313121 its reverse (12131331032), we get a palindrome (35144644153).

The spelling of 23013313121 in words is "twenty-three billion, thirteen million, three hundred thirteen thousand, one hundred twenty-one".