31123013333312 has 56 divisors (see below), whose sum is σ = 61810770622560. Its totient is φ = 15548651389440.

The previous prime is 31123013333239. The next prime is 31123013333341. The reversal of 31123013333312 is 21333331032113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387346262 + ... + 387426602.

Almost surely, 2^{31123013333312} is an apocalyptic number.

31123013333312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31123013333312 is a deficient number, since it is larger than the sum of its proper divisors (30687757289248).

31123013333312 is a wasteful number, since it uses less digits than its factorization.

31123013333312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85279 (or 85269 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31123013333312 its reverse (21333331032113), we get a palindrome (52456344365425).

The spelling of 31123013333312 in words is "thirty-one trillion, one hundred twenty-three billion, thirteen million, three hundred thirty-three thousand, three hundred twelve".