231040113121 has 2 divisors, whose sum is σ = 231040113122. Its totient is φ = 231040113120.

The previous prime is 231040113091. The next prime is 231040113127. The reversal of 231040113121 is 121311040132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215007488721 + 16032624400 = 463689^2 + 126620^2 .

It is a cyclic number.

It is not a de Polignac number, because 231040113121 - 2¹³ = 231040104929 is a prime.

It is not a weakly prime, because it can be changed into another prime (231040113127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115520056560 + 115520056561.

It is an arithmetic number, because the mean of its divisors is an integer number (115520056561).

Almost surely, 2^231040113121 is an apocalyptic number.

It is an amenable number.

231040113121 is a deficient number, since it is larger than the sum of its proper divisors (1).

231040113121 is an equidigital number, since it uses as much as digits as its factorization.

231040113121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231040113121 its reverse (121311040132), we get a palindrome (352351153253).

The spelling of 231040113121 in words is "two hundred thirty-one billion, forty million, one hundred thirteen thousand, one hundred twenty-one".