23031203021137 has 2 divisors, whose sum is σ = 23031203021138. Its totient is φ = 23031203021136.

The previous prime is 23031203021131. The next prime is 23031203021161. The reversal of 23031203021137 is 73112030213032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16308803789056 + 6722399232081 = 4038416^2 + 2592759^2 .

It is a cyclic number.

It is not a de Polignac number, because 23031203021137 - 2²³ = 23031194632529 is a prime.

It is not a weakly prime, because it can be changed into another prime (23031203021131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515601510568 + 11515601510569.

It is an arithmetic number, because the mean of its divisors is an integer number (11515601510569).

Almost surely, 2^{23031203021137} is an apocalyptic number.

It is an amenable number.

23031203021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031203021137 is an equidigital number, since it uses as much as digits as its factorization.

23031203021137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 23031203021137 its reverse (73112030213032), we get a palindrome (96143233234169).

The spelling of 23031203021137 in words is "twenty-three trillion, thirty-one billion, two hundred three million, twenty-one thousand, one hundred thirty-seven".