103131323121 has 4 divisors (see below), whose sum is σ = 137508430832. Its totient is φ = 68754215412.

The previous prime is 103131323107. The next prime is 103131323129. The reversal of 103131323121 is 121323131301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-103131323121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103131323129) 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, 17188553851 + ... + 17188553856.

It is an arithmetic number, because the mean of its divisors is an integer number (34377107708).

Almost surely, 2^103131323121 is an apocalyptic number.

It is an amenable number.

103131323121 is a deficient number, since it is larger than the sum of its proper divisors (34377107711).

103131323121 is an equidigital number, since it uses as much as digits as its factorization.

103131323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34377107710.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 103131323121 its reverse (121323131301), we get a palindrome (224454454422).

The spelling of 103131323121 in words is "one hundred three billion, one hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty-one".