31311021130003 has 4 divisors (see below), whose sum is σ = 31325853449088. Its totient is φ = 31296188810920.

The previous prime is 31311021129953. The next prime is 31311021130079. The reversal of 31311021130003 is 30003112011313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311021130003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311021100003) 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, 7416156376 + ... + 7416160597.

It is an arithmetic number, because the mean of its divisors is an integer number (7831463362272).

Almost surely, 2^{31311021130003} is an apocalyptic number.

31311021130003 is a deficient number, since it is larger than the sum of its proper divisors (14832319085).

31311021130003 is a wasteful number, since it uses less digits than its factorization.

31311021130003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14832319084.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31311021130003 its reverse (30003112011313), we get a palindrome (61314133141316).

The spelling of 31311021130003 in words is "thirty-one trillion, three hundred eleven billion, twenty-one million, one hundred thirty thousand, three".