231011131011 has 4 divisors (see below), whose sum is σ = 308014841352. Its totient is φ = 154007420672.

The previous prime is 231011131007. The next prime is 231011131063. The reversal of 231011131011 is 110131110132.

231011131011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231011131011 - 2² = 231011131007 is a prime.

It is a super-2 number, since 2×231011131011² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231011131711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38501855166 + ... + 38501855171.

It is an arithmetic number, because the mean of its divisors is an integer number (77003710338).

Almost surely, 2^231011131011 is an apocalyptic number.

231011131011 is a deficient number, since it is larger than the sum of its proper divisors (77003710341).

231011131011 is an equidigital number, since it uses as much as digits as its factorization.

231011131011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77003710340.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 231011131011 its reverse (110131110132), we get a palindrome (341142241143).

The spelling of 231011131011 in words is "two hundred thirty-one billion, eleven million, one hundred thirty-one thousand, eleven".