231021112233101 has 2 divisors, whose sum is σ = 231021112233102. Its totient is φ = 231021112233100.

The previous prime is 231021112233097. The next prime is 231021112233113. The reversal of 231021112233101 is 101332211120132.

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., 144300132225001 + 86720980008100 = 12012499^2 + 9312410^2 .

It is a cyclic number.

It is not a de Polignac number, because 231021112233101 - 2² = 231021112233097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231021112233001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510556116550 + 115510556116551.

It is an arithmetic number, because the mean of its divisors is an integer number (115510556116551).

Almost surely, 2^{231021112233101} is an apocalyptic number.

It is an amenable number.

231021112233101 is a deficient number, since it is larger than the sum of its proper divisors (1).

231021112233101 is an equidigital number, since it uses as much as digits as its factorization.

231021112233101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 231021112233101 its reverse (101332211120132), we get a palindrome (332353323353233).

The spelling of 231021112233101 in words is "two hundred thirty-one trillion, twenty-one billion, one hundred twelve million, two hundred thirty-three thousand, one hundred one".