31103021133212 has 48 divisors (see below), whose sum is σ = 62302184017920. Its totient is φ = 13309272000000.

The previous prime is 31103021133137. The next prime is 31103021133269. The reversal of 31103021133212 is 21233112030113.

It is a super-2 number, since 2×31103021133212² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 99748364 + ... + 100059692.

It is an arithmetic number, because the mean of its divisors is an integer number (1297962167040).

Almost surely, 2^{31103021133212} is an apocalyptic number.

It is an amenable number.

31103021133212 is an abundant number, since it is smaller than the sum of its proper divisors (31199162884708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103021133212 is a wasteful number, since it uses less digits than its factorization.

31103021133212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316842 (or 316840 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31103021133212 its reverse (21233112030113), we get a palindrome (52336133163325).

The spelling of 31103021133212 in words is "thirty-one trillion, one hundred three billion, twenty-one million, one hundred thirty-three thousand, two hundred twelve".