31311001030103 has 4 divisors (see below), whose sum is σ = 32958948452760. Its totient is φ = 29663053607448.

The previous prime is 31311001030069. The next prime is 31311001030117. The reversal of 31311001030103 is 30103010011313.

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 31311001030103 - 2³⁰ = 31309927288279 is a prime.

It is a super-2 number, since 2×31311001030103² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311001030403) 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, 823973711300 + ... + 823973711337.

It is an arithmetic number, because the mean of its divisors is an integer number (8239737113190).

Almost surely, 2^{31311001030103} is an apocalyptic number.

31311001030103 is a deficient number, since it is larger than the sum of its proper divisors (1647947422657).

31311001030103 is a wasteful number, since it uses less digits than its factorization.

31311001030103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647947422656.

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 31311001030103 its reverse (30103010011313), we get a palindrome (61414011041416).

The spelling of 31311001030103 in words is "thirty-one trillion, three hundred eleven billion, one million, thirty thousand, one hundred three".