31003121203 has 6 divisors (see below), whose sum is σ = 31599125684. Its totient is φ = 30418153896.

The previous prime is 31003121159. The next prime is 31003121213. The reversal of 31003121203 is 30212130013.

It is not a de Polignac number, because 31003121203 - 2²¹ = 31001024051 is a prime.

It is a super-2 number, since 2×31003121203² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31003121213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5515725 + ... + 5521342.

Almost surely, 2^31003121203 is an apocalyptic number.

31003121203 is a deficient number, since it is larger than the sum of its proper divisors (596004481).

31003121203 is an equidigital number, since it uses as much as digits as its factorization.

31003121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11037173 (or 11037120 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31003121203 its reverse (30212130013), we get a palindrome (61215251216).

The spelling of 31003121203 in words is "thirty-one billion, three million, one hundred twenty-one thousand, two hundred three".