231011113133 has 2 divisors, whose sum is σ = 231011113134. Its totient is φ = 231011113132.

The previous prime is 231011113063. The next prime is 231011113147. The reversal of 231011113133 is 331311110132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195281796649 + 35729316484 = 441907^2 + 189022^2 .

It is a cyclic number.

It is not a de Polignac number, because 231011113133 - 2²⁴ = 230994335917 is a prime.

It is a super-2 number, since 2×231011113133² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231011113633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115505556566 + 115505556567.

It is an arithmetic number, because the mean of its divisors is an integer number (115505556567).

Almost surely, 2^231011113133 is an apocalyptic number.

It is an amenable number.

231011113133 is a deficient number, since it is larger than the sum of its proper divisors (1).

231011113133 is an equidigital number, since it uses as much as digits as its factorization.

231011113133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 231011113133 its reverse (331311110132), we get a palindrome (562322223265).

The spelling of 231011113133 in words is "two hundred thirty-one billion, eleven million, one hundred thirteen thousand, one hundred thirty-three".