31021033103 has 4 divisors (see below), whose sum is σ = 31022094768. Its totient is φ = 31019971440.

The previous prime is 31021033093. The next prime is 31021033111. The reversal of 31021033103 is 30133012013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30133012013 = 13 ⋅2317924001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31021033103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021036103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485726 + ... + 545867.

It is an arithmetic number, because the mean of its divisors is an integer number (7755523692).

Almost surely, 2^31021033103 is an apocalyptic number.

31021033103 is a deficient number, since it is larger than the sum of its proper divisors (1061665).

31021033103 is a wasteful number, since it uses less digits than its factorization.

31021033103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061664.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31021033103 its reverse (30133012013), we get a palindrome (61154045116).

The spelling of 31021033103 in words is "thirty-one billion, twenty-one million, thirty-three thousand, one hundred three".