201021202011231 has 144 divisors (see below), whose sum is σ = 359071352640000. Its totient is φ = 105863057277696.

The previous prime is 201021202011151. The next prime is 201021202011251. The reversal of 201021202011231 is 132110202120102.

201021202011231 is a `hidden beast` number, since 20 + 1 + 0 + 212 + 0 + 201 + 1 + 231 = 666.

It is not a de Polignac number, because 201021202011231 - 2³⁰ = 201020128269407 is a prime.

It is a super-2 number, since 2×201021202011231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021202011251) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 15975611766 + ... + 15975624348.

It is an arithmetic number, because the mean of its divisors is an integer number (2493551060000).

Almost surely, 2^{201021202011231} is an apocalyptic number.

201021202011231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201021202011231 is a deficient number, since it is larger than the sum of its proper divisors (158050150628769).

201021202011231 is a wasteful number, since it uses less digits than its factorization.

201021202011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22438 (or 22398 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 201021202011231 its reverse (132110202120102), we get a palindrome (333131404131333).

The spelling of 201021202011231 in words is "two hundred one trillion, twenty-one billion, two hundred two million, eleven thousand, two hundred thirty-one".