31122320000 has 80 divisors (see below), whose sum is σ = 77477269650. Its totient is φ = 12448896000.

The previous prime is 31122319973. The next prime is 31122320039. The reversal of 31122320000 is 2322113.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 5973434944 + 25148885056 = 77288^2 + 158584^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 114515 + ... + 274514.

Almost surely, 2^31122320000 is an apocalyptic number.

It is an amenable number.

31122320000 is an abundant number, since it is smaller than the sum of its proper divisors (46354949650).

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

31122320000 is an frugal number, since it uses more digits than its factorization.

31122320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389063 (or 389036 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31122320000 its reverse (2322113), we get a palindrome (31124642113).

The spelling of 31122320000 in words is "thirty-one billion, one hundred twenty-two million, three hundred twenty thousand".