31120110103 has 4 divisors (see below), whose sum is σ = 31121513848. Its totient is φ = 31118706360.

The previous prime is 31120110059. The next prime is 31120110107. The reversal of 31120110103 is 30101102113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30101102113 = 96269 ⋅312677.

It is a cyclic number.

It is not a de Polignac number, because 31120110103 - 2¹⁷ = 31119979031 is a prime.

It is a super-2 number, since 2×31120110103² (a number of 22 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 (31120110107) 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, 668076 + ... + 713137.

It is an arithmetic number, because the mean of its divisors is an integer number (7780378462).

Almost surely, 2^31120110103 is an apocalyptic number.

31120110103 is a deficient number, since it is larger than the sum of its proper divisors (1403745).

31120110103 is a wasteful number, since it uses less digits than its factorization.

31120110103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403744.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31120110103 its reverse (30101102113), we get a palindrome (61221212216).

The spelling of 31120110103 in words is "thirty-one billion, one hundred twenty million, one hundred ten thousand, one hundred three".