31021230121332 has 48 divisors (see below), whose sum is σ = 79057247270400. Its totient is φ = 9389168472160.

The previous prime is 31021230121331. The next prime is 31021230121351. The reversal of 31021230121332 is 23312103212013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021230121331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139942482 + ... + 140163977.

It is an arithmetic number, because the mean of its divisors is an integer number (1647025984800).

Almost surely, 2^{31021230121332} is an apocalyptic number.

It is an amenable number.

31021230121332 is an abundant number, since it is smaller than the sum of its proper divisors (48036017149068).

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

31021230121332 is a wasteful number, since it uses less digits than its factorization.

31021230121332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280107316 (or 280107314 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31021230121332 its reverse (23312103212013), we get a palindrome (54333333333345).

The spelling of 31021230121332 in words is "thirty-one trillion, twenty-one billion, two hundred thirty million, one hundred twenty-one thousand, three hundred thirty-two".