31311120403 has 16 divisors (see below), whose sum is σ = 33944339520. Its totient is φ = 28792766464.

The previous prime is 31311120367. The next prime is 31311120431. The reversal of 31311120403 is 30402111313.

It is not a de Polignac number, because 31311120403 - 2¹⁷ = 31310989331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311120443) 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, 54675 + ... + 256147.

It is an arithmetic number, because the mean of its divisors is an integer number (2121521220).

Almost surely, 2^31311120403 is an apocalyptic number.

31311120403 is a deficient number, since it is larger than the sum of its proper divisors (2633219117).

31311120403 is a wasteful number, since it uses less digits than its factorization.

31311120403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201758.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31311120403 its reverse (30402111313), we get a palindrome (61713231716).

The spelling of 31311120403 in words is "thirty-one billion, three hundred eleven million, one hundred twenty thousand, four hundred three".