201020113231 has 16 divisors (see below), whose sum is σ = 249184192320. Its totient is φ = 158212177920.

The previous prime is 201020113223. The next prime is 201020113237. The reversal of 201020113231 is 132311020102.

It is a cyclic number.

It is not a de Polignac number, because 201020113231 - 2³ = 201020113223 is a prime.

It is a super-2 number, since 2×201020113231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020113237) 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, 20595666 + ... + 20605423.

It is an arithmetic number, because the mean of its divisors is an integer number (15574012020).

Almost surely, 2^201020113231 is an apocalyptic number.

201020113231 is a deficient number, since it is larger than the sum of its proper divisors (48164079089).

201020113231 is a wasteful number, since it uses less digits than its factorization.

201020113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41201154.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201020113231 its reverse (132311020102), we get a palindrome (333331133333).

The spelling of 201020113231 in words is "two hundred one billion, twenty million, one hundred thirteen thousand, two hundred thirty-one".