31203121130 has 16 divisors (see below), whose sum is σ = 56417485824. Its totient is φ = 12425277840.

The previous prime is 31203121099. The next prime is 31203121151. The reversal of 31203121130 is 3112130213.

It is a junction number, because it is equal to n+sod(n) for n = 31203121099 and 31203121108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6993986 + ... + 6998445.

It is an arithmetic number, because the mean of its divisors is an integer number (3526092864).

Almost surely, 2^31203121130 is an apocalyptic number.

31203121130 is a deficient number, since it is larger than the sum of its proper divisors (25214364694).

31203121130 is a wasteful number, since it uses less digits than its factorization.

31203121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13992661.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31203121130 its reverse (3112130213), we get a palindrome (34315251343).

The spelling of 31203121130 in words is "thirty-one billion, two hundred three million, one hundred twenty-one thousand, one hundred thirty".