231113121311 has 2 divisors, whose sum is σ = 231113121312. Its totient is φ = 231113121310.

The previous prime is 231113121269. The next prime is 231113121341. The reversal of 231113121311 is 113121311132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231113121311 is a prime.

It is a super-2 number, since 2×231113121311² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231113121341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115556560655 + 115556560656.

It is an arithmetic number, because the mean of its divisors is an integer number (115556560656).

Almost surely, 2^231113121311 is an apocalyptic number.

231113121311 is a deficient number, since it is larger than the sum of its proper divisors (1).

231113121311 is an equidigital number, since it uses as much as digits as its factorization.

231113121311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 20.

Adding to 231113121311 its reverse (113121311132), we get a palindrome (344234432443).

The spelling of 231113121311 in words is "two hundred thirty-one billion, one hundred thirteen million, one hundred twenty-one thousand, three hundred eleven".