231001202131212 has 192 divisors, whose sum is σ = 596371790536704. Its totient is φ = 69338693191680.

The previous prime is 231001202131177. The next prime is 231001202131253. The reversal of 231001202131212 is 212131202100132.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1999727568 + ... + 1999843080.

It is an arithmetic number, because the mean of its divisors is an integer number (3106103075712).

Almost surely, 2^{231001202131212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231001202131212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298185895268352).

231001202131212 is an abundant number, since it is smaller than the sum of its proper divisors (365370588405492).

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

231001202131212 is a wasteful number, since it uses less digits than its factorization.

231001202131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121928 (or 121926 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 231001202131212 its reverse (212131202100132), we get a palindrome (443132404231344).

The spelling of 231001202131212 in words is "two hundred thirty-one trillion, one billion, two hundred two million, one hundred thirty-one thousand, two hundred twelve".