103131021 has 16 divisors (see below), whose sum is σ = 157667328. Its totient is φ = 58738800.

The previous prime is 103130983. The next prime is 103131043. The reversal of 103131021 is 120131301.

It is not a de Polignac number, because 103131021 - 2⁶ = 103130957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103130988 and 103131006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103130021) 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, 1365 + ... + 14426.

It is an arithmetic number, because the mean of its divisors is an integer number (9854208).

Almost surely, 2^103131021 is an apocalyptic number.

It is an amenable number.

103131021 is a deficient number, since it is larger than the sum of its proper divisors (54536307).

103131021 is a wasteful number, since it uses less digits than its factorization.

103131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16112.

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

The square root of 103131021 is about 10155.3444550148. The cubic root of 103131021 is about 468.9534901741.

Adding to 103131021 its reverse (120131301), we get a palindrome (223262322).

The spelling of 103131021 in words is "one hundred three million, one hundred thirty-one thousand, twenty-one".