201131201232 has 120 divisors (see below), whose sum is σ = 612189520488. Its totient is φ = 61273728000.

The previous prime is 201131201221. The next prime is 201131201233. The reversal of 201131201232 is 232102131102.

201131201232 is a `hidden beast` number, since 201 + 1 + 31 + 201 + 232 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 79341368976 + 121789832256 = 281676^2 + 348984^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131201233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 342819 + ... + 720962.

Almost surely, 2^201131201232 is an apocalyptic number.

It is an amenable number.

201131201232 is an abundant number, since it is smaller than the sum of its proper divisors (411058319256).

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

201131201232 is a wasteful number, since it uses less digits than its factorization.

201131201232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063909 (or 1063900 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201131201232 its reverse (232102131102), we get a palindrome (433233332334).

The spelling of 201131201232 in words is "two hundred one billion, one hundred thirty-one million, two hundred one thousand, two hundred thirty-two".