23121301012131 has 16 divisors (see below), whose sum is σ = 35232752300544. Its totient is φ = 13212061901184.

The previous prime is 23121301012111. The next prime is 23121301012133. The reversal of 23121301012131 is 13121010312132.

It is not a de Polignac number, because 23121301012131 - 2⁵ = 23121301012099 is a prime.

It is a super-2 number, since 2×23121301012131² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 23121301012098 and 23121301012107.

It is not an unprimeable number, because it can be changed into a prime (23121301012133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1973190 + ... + 7080683.

It is an arithmetic number, because the mean of its divisors is an integer number (2202047018784).

Almost surely, 2^{23121301012131} is an apocalyptic number.

23121301012131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23121301012131 is a deficient number, since it is larger than the sum of its proper divisors (12111451288413).

23121301012131 is a wasteful number, since it uses less digits than its factorization.

23121301012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9175490.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 23121301012131 its reverse (13121010312132), we get a palindrome (36242311324263).

The spelling of 23121301012131 in words is "twenty-three trillion, one hundred twenty-one billion, three hundred one million, twelve thousand, one hundred thirty-one".