31311231203 has 32 divisors (see below), whose sum is σ = 38588313600. Its totient is φ = 24811341984.

The previous prime is 31311231199. The next prime is 31311231257. The reversal of 31311231203 is 30213211313.

It is a cyclic number.

It is not a de Polignac number, because 31311231203 - 2² = 31311231199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311237203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 937058 + ... + 969896.

It is an arithmetic number, because the mean of its divisors is an integer number (1205884800).

Almost surely, 2^31311231203 is an apocalyptic number.

31311231203 is a deficient number, since it is larger than the sum of its proper divisors (7277082397).

31311231203 is a wasteful number, since it uses less digits than its factorization.

31311231203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33039.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31311231203 its reverse (30213211313), we get a palindrome (61524442516).

The spelling of 31311231203 in words is "thirty-one billion, three hundred eleven million, two hundred thirty-one thousand, two hundred three".