31020120123112 has 16 divisors (see below), whose sum is σ = 58457967493860. Its totient is φ = 15431328791424.

The previous prime is 31020120123053. The next prime is 31020120123121. The reversal of 31020120123112 is 21132102102013.

It can be written as a sum of positive squares in 2 ways, for example, as 30874536668196 + 145583454916 = 5556486^2 + 381554^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31020120123112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9841407093 + ... + 9841410244.

Almost surely, 2^{31020120123112} is an apocalyptic number.

It is an amenable number.

31020120123112 is a deficient number, since it is larger than the sum of its proper divisors (27437847370748).

31020120123112 is a wasteful number, since it uses less digits than its factorization.

31020120123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19682817540 (or 19682817536 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31020120123112 its reverse (21132102102013), we get a palindrome (52152222225125).

The spelling of 31020120123112 in words is "thirty-one trillion, twenty billion, one hundred twenty million, one hundred twenty-three thousand, one hundred twelve".