31103312310203 has 4 divisors (see below), whose sum is σ = 35546642640240. Its totient is φ = 26659981980168.

The previous prime is 31103312310193. The next prime is 31103312310233. The reversal of 31103312310203 is 30201321330113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31103312310203 - 2²² = 31103308115899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31103312310233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221665165008 + ... + 2221665165021.

It is an arithmetic number, because the mean of its divisors is an integer number (8886660660060).

Almost surely, 2^{31103312310203} is an apocalyptic number.

31103312310203 is a deficient number, since it is larger than the sum of its proper divisors (4443330330037).

31103312310203 is an equidigital number, since it uses as much as digits as its factorization.

31103312310203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443330330036.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31103312310203 its reverse (30201321330113), we get a palindrome (61304633640316).

The spelling of 31103312310203 in words is "thirty-one trillion, one hundred three billion, three hundred twelve million, three hundred ten thousand, two hundred three".