31231301221232 has 80 divisors (see below), whose sum is σ = 69392989248960. Its totient is φ = 13338823163904.

The previous prime is 31231301221231. The next prime is 31231301221273. The reversal of 31231301221232 is 23212210313213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231301221231) 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, 80162648 + ... + 80551304.

It is an arithmetic number, because the mean of its divisors is an integer number (867412365612).

Almost surely, 2^{31231301221232} is an apocalyptic number.

It is an amenable number.

31231301221232 is an abundant number, since it is smaller than the sum of its proper divisors (38161688027728).

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

31231301221232 is a wasteful number, since it uses less digits than its factorization.

31231301221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391138 (or 391132 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31231301221232 its reverse (23212210313213), we get a palindrome (54443511534445).

The spelling of 31231301221232 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred one million, two hundred twenty-one thousand, two hundred thirty-two".