31310121442000 has 80 divisors (see below), whose sum is σ = 75865929984000. Its totient is φ = 12497901955200.

The previous prime is 31310121441983. The next prime is 31310121442003. The reversal of 31310121442000 is 24412101313.

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 (31310121442003) 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, 15383400 + ... + 17299399.

It is an arithmetic number, because the mean of its divisors is an integer number (948324124800).

Almost surely, 2^{31310121442000} is an apocalyptic number.

It is an amenable number.

31310121442000 is an abundant number, since it is smaller than the sum of its proper divisors (44555808542000).

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

31310121442000 is a wasteful number, since it uses less digits than its factorization.

31310121442000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32683301 (or 32683285 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31310121442000 its reverse (24412101313), we get a palindrome (31334533543313).

The spelling of 31310121442000 in words is "thirty-one trillion, three hundred ten billion, one hundred twenty-one million, four hundred forty-two thousand".