31200001200220 has 24 divisors (see below), whose sum is σ = 67633550990208. Its totient is φ = 12077419819200.

The previous prime is 31200001200217. The next prime is 31200001200229. The reversal of 31200001200220 is 2200210000213.

It is a self number, because there is not a number n which added to its sum of digits gives 31200001200220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200001200229) by changing a digit.

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, 25161290671 + ... + 25161291910.

It is an arithmetic number, because the mean of its divisors is an integer number (2818064624592).

Almost surely, 2^{31200001200220} is an apocalyptic number.

It is an amenable number.

31200001200220 is an abundant number, since it is smaller than the sum of its proper divisors (36433549789988).

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

31200001200220 is a wasteful number, since it uses less digits than its factorization.

31200001200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50322582621 (or 50322582619 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 31200001200220 its reverse (2200210000213), we get a palindrome (33400211200433).

The spelling of 31200001200220 in words is "thirty-one trillion, two hundred billion, one million, two hundred thousand, two hundred twenty".