231101011031 has 24 divisors (see below), whose sum is σ = 262357425792. Its totient is φ = 203287669200.

The previous prime is 231101011003. The next prime is 231101011121. The reversal of 231101011031 is 130110101132.

It is a happy number.

It is not a de Polignac number, because 231101011031 - 2¹⁴ = 231100994647 is a prime.

It is a super-2 number, since 2×231101011031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231101010997 and 231101011015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231101011331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349166 + ... + 764276.

It is an arithmetic number, because the mean of its divisors is an integer number (10931559408).

Almost surely, 2^231101011031 is an apocalyptic number.

231101011031 is a deficient number, since it is larger than the sum of its proper divisors (31256414761).

231101011031 is a wasteful number, since it uses less digits than its factorization.

231101011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415283 (or 415272 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 231101011031 its reverse (130110101132), we get a palindrome (361211112163).

It can be divided in two parts, 23110101 and 1031, that added together give a palindrome (23111132).

The spelling of 231101011031 in words is "two hundred thirty-one billion, one hundred one million, eleven thousand, thirty-one".