101311231021 has 48 divisors (see below), whose sum is σ = 137147472000. Its totient is φ = 72823006080.

The previous prime is 101311231001. The next prime is 101311231039. The reversal of 101311231021 is 120132113101.

It is a happy number.

It is not a de Polignac number, because 101311231021 - 2⁵ = 101311230989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101311230986 and 101311231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101311231001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30708030 + ... + 30711328.

It is an arithmetic number, because the mean of its divisors is an integer number (2857239000).

Almost surely, 2^101311231021 is an apocalyptic number.

101311231021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101311231021 is a deficient number, since it is larger than the sum of its proper divisors (35836240979).

101311231021 is a wasteful number, since it uses less digits than its factorization.

101311231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6130 (or 6119 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 101311231021 its reverse (120132113101), we get a palindrome (221443344122).

The spelling of 101311231021 in words is "one hundred one billion, three hundred eleven million, two hundred thirty-one thousand, twenty-one".