31120210000220 has 24 divisors (see below), whose sum is σ = 71293572001008. Its totient is φ = 11316440000000.

The previous prime is 31120210000219. The next prime is 31120210000249. The reversal of 31120210000220 is 2200001202113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31120210000195 and 31120210000204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70727749781 + ... + 70727750220.

It is an arithmetic number, because the mean of its divisors is an integer number (2970565500042).

Almost surely, 2^{31120210000220} is an apocalyptic number.

It is an amenable number.

31120210000220 is an abundant number, since it is smaller than the sum of its proper divisors (40173362000788).

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

31120210000220 is a wasteful number, since it uses less digits than its factorization.

31120210000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141455500021 (or 141455500019 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31120210000220 its reverse (2200001202113), we get a palindrome (33320211202333).

The spelling of 31120210000220 in words is "thirty-one trillion, one hundred twenty billion, two hundred ten million, two hundred twenty", and thus it is an aban number.