31103023021231 has 16 divisors (see below), whose sum is σ = 36416422889280. Its totient is φ = 26007262571520.

The previous prime is 31103023021223. The next prime is 31103023021237. The reversal of 31103023021231 is 13212032030113.

It is a cyclic number.

It is not a de Polignac number, because 31103023021231 - 2³ = 31103023021223 is a prime.

It is a super-2 number, since 2×31103023021231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103023021237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302846 + ... + 7993963.

It is an arithmetic number, because the mean of its divisors is an integer number (2276026430580).

Almost surely, 2^{31103023021231} is an apocalyptic number.

31103023021231 is a deficient number, since it is larger than the sum of its proper divisors (5313399868049).

31103023021231 is a wasteful number, since it uses less digits than its factorization.

31103023021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308514.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31103023021231 its reverse (13212032030113), we get a palindrome (44315055051344).

The spelling of 31103023021231 in words is "thirty-one trillion, one hundred three billion, twenty-three million, twenty-one thousand, two hundred thirty-one".