101312031 has 16 divisors (see below), whose sum is σ = 139536000. Its totient is φ = 65335968.

The previous prime is 101312023. The next prime is 101312039. The reversal of 101312031 is 130213101.

It is an interprime number because it is at equal distance from previous prime (101312023) and next prime (101312039).

It is not a de Polignac number, because 101312031 - 2³ = 101312023 is a prime.

It is a super-2 number, since 2×101312031² = 20528255250689922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101311998 and 101312016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101312039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17320 + ... + 22418.

It is an arithmetic number, because the mean of its divisors is an integer number (8721000).

Almost surely, 2^101312031 is an apocalyptic number.

101312031 is a deficient number, since it is larger than the sum of its proper divisors (38223969).

101312031 is a wasteful number, since it uses less digits than its factorization.

101312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 101312031 is about 10065.3877719639. The cubic root of 101312031 is about 466.1800390492.

Adding to 101312031 its reverse (130213101), we get a palindrome (231525132).

The spelling of 101312031 in words is "one hundred one million, three hundred twelve thousand, thirty-one".