31121303129 has 8 divisors (see below), whose sum is σ = 35571665280. Its totient is φ = 26672056416.

The previous prime is 31121303119. The next prime is 31121303149. The reversal of 31121303129 is 92130312113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31121303129 - 2¹⁶ = 31121237593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31121303098 and 31121303107.

It is not an unprimeable number, because it can be changed into a prime (31121303119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218189 + ... + 331434.

It is an arithmetic number, because the mean of its divisors is an integer number (4446458160).

Almost surely, 2^31121303129 is an apocalyptic number.

It is an amenable number.

31121303129 is a deficient number, since it is larger than the sum of its proper divisors (4450362151).

31121303129 is an equidigital number, since it uses as much as digits as its factorization.

31121303129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557719.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 31121303129 in words is "thirty-one billion, one hundred twenty-one million, three hundred three thousand, one hundred twenty-nine".