31200211200020 has 48 divisors (see below), whose sum is σ = 68395366206720. Its totient is φ = 11932896155136.

The previous prime is 31200211199999. The next prime is 31200211200049. The reversal of 31200211200020 is 2000211200213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31200211199968 and 31200211200004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11798432 + ... + 14198711.

It is an arithmetic number, because the mean of its divisors is an integer number (1424903462640).

Almost surely, 2^{31200211200020} is an apocalyptic number.

It is an amenable number.

31200211200020 is an abundant number, since it is smaller than the sum of its proper divisors (37195155006700).

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

31200211200020 is a wasteful number, since it uses less digits than its factorization.

31200211200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25999784 (or 25999782 counting only the distinct ones).

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

Adding to 31200211200020 its reverse (2000211200213), we get a palindrome (33200422400233).

The spelling of 31200211200020 in words is "thirty-one trillion, two hundred billion, two hundred eleven million, two hundred thousand, twenty".