103131131231 has 4 divisors (see below), whose sum is σ = 103134603600. Its totient is φ = 103127658864.

The previous prime is 103131131197. The next prime is 103131131269. The reversal of 103131131231 is 132131131301.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103131131231 is a prime.

It is a super-2 number, since 2×103131131231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103131131281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691246 + ... + 1751163.

It is an arithmetic number, because the mean of its divisors is an integer number (25783650900).

Almost surely, 2^103131131231 is an apocalyptic number.

103131131231 is a deficient number, since it is larger than the sum of its proper divisors (3472369).

103131131231 is an equidigital number, since it uses as much as digits as its factorization.

103131131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472368.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 103131131231 its reverse (132131131301), we get a palindrome (235262262532).

The spelling of 103131131231 in words is "one hundred three billion, one hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty-one".