31012020022000 has 80 divisors (see below), whose sum is σ = 76258031896800. Its totient is φ = 12194556979200.

The previous prime is 31012020021991. The next prime is 31012020022003. The reversal of 31012020022000 is 22002021013.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012020022003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131288865 + ... + 131524864.

It is an arithmetic number, because the mean of its divisors is an integer number (953225398710).

Almost surely, 2^{31012020022000} is an apocalyptic number.

It is an amenable number.

31012020022000 is an abundant number, since it is smaller than the sum of its proper divisors (45246011874800).

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

31012020022000 is a wasteful number, since it uses less digits than its factorization.

31012020022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262813811 (or 262813795 counting only the distinct ones).

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

Adding to 31012020022000 its reverse (22002021013), we get a palindrome (31034022043013).

The spelling of 31012020022000 in words is "thirty-one trillion, twelve billion, twenty million, twenty-two thousand".