31201023121120 has 96 divisors (see below), whose sum is σ = 73868074301952. Its totient is φ = 12454060780032.

The previous prime is 31201023121117. The next prime is 31201023121129. The reversal of 31201023121120 is 2112132010213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201023121129) 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, 832385899 + ... + 832423381.

It is an arithmetic number, because the mean of its divisors is an integer number (769459107312).

Almost surely, 2^{31201023121120} is an apocalyptic number.

It is an amenable number.

31201023121120 is an abundant number, since it is smaller than the sum of its proper divisors (42667051180832).

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

31201023121120 is a wasteful number, since it uses less digits than its factorization.

31201023121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48344 (or 48336 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31201023121120 its reverse (2112132010213), we get a palindrome (33313155131333).

The spelling of 31201023121120 in words is "thirty-one trillion, two hundred one billion, twenty-three million, one hundred twenty-one thousand, one hundred twenty".