31130103121 has 16 divisors (see below), whose sum is σ = 33763744000. Its totient is φ = 28531217088.

The previous prime is 31130103097. The next prime is 31130103149. The reversal of 31130103121 is 12130103113.

It is a cyclic number.

It is not a de Polignac number, because 31130103121 - 2⁹ = 31130102609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31130103095 and 31130103104.

It is not an unprimeable number, because it can be changed into a prime (31130103821) 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, 1247515 + ... + 1272223.

It is an arithmetic number, because the mean of its divisors is an integer number (2110234000).

Almost surely, 2^31130103121 is an apocalyptic number.

It is an amenable number.

31130103121 is a deficient number, since it is larger than the sum of its proper divisors (2633640879).

31130103121 is a wasteful number, since it uses less digits than its factorization.

31130103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25408.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31130103121 its reverse (12130103113), we get a palindrome (43260206234).

The spelling of 31130103121 in words is "thirty-one billion, one hundred thirty million, one hundred three thousand, one hundred twenty-one".