31120123220312 has 16 divisors (see below), whose sum is σ = 66685978329360. Its totient is φ = 13337195665824.

The previous prime is 31120123220281. The next prime is 31120123220353. The reversal of 31120123220312 is 21302232102113.

It is a congruent number.

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, 277858242983 + ... + 277858243094.

It is an arithmetic number, because the mean of its divisors is an integer number (4167873645585).

Almost surely, 2^{31120123220312} is an apocalyptic number.

It is an amenable number.

31120123220312 is an abundant number, since it is smaller than the sum of its proper divisors (35565855109048).

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

31120123220312 is a wasteful number, since it uses less digits than its factorization.

31120123220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555716486090 (or 555716486086 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31120123220312 its reverse (21302232102113), we get a palindrome (52422355322425).

The spelling of 31120123220312 in words is "thirty-one trillion, one hundred twenty billion, one hundred twenty-three million, two hundred twenty thousand, three hundred twelve".