31101220120 has 16 divisors (see below), whose sum is σ = 69977745360. Its totient is φ = 12440488032.

The previous prime is 31101220091. The next prime is 31101220133. The reversal of 31101220120 is 2102210113.

It is a self number, because there is not a number n which added to its sum of digits gives 31101220120.

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, 388765212 + ... + 388765291.

It is an arithmetic number, because the mean of its divisors is an integer number (4373609085).

Almost surely, 2^31101220120 is an apocalyptic number.

It is an amenable number.

31101220120 is an abundant number, since it is smaller than the sum of its proper divisors (38876525240).

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

31101220120 is a wasteful number, since it uses less digits than its factorization.

31101220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777530514 (or 777530510 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31101220120 its reverse (2102210113), we get a palindrome (33203430233).

The spelling of 31101220120 in words is "thirty-one billion, one hundred one million, two hundred twenty thousand, one hundred twenty".