201330311231 has 16 divisors (see below), whose sum is σ = 236358534720. Its totient is φ = 167870672640.

The previous prime is 201330311227. The next prime is 201330311233. The reversal of 201330311231 is 132113033102.

It is a cyclic number.

It is not a de Polignac number, because 201330311231 - 2² = 201330311227 is a prime.

It is a super-2 number, since 2×201330311231² (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 (201330311233) 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, 1239485 + ... + 1392473.

It is an arithmetic number, because the mean of its divisors is an integer number (14772408420).

Almost surely, 2^201330311231 is an apocalyptic number.

201330311231 is a deficient number, since it is larger than the sum of its proper divisors (35028223489).

201330311231 is a wasteful number, since it uses less digits than its factorization.

201330311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158114.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 201330311231 its reverse (132113033102), we get a palindrome (333443344333).

The spelling of 201330311231 in words is "two hundred one billion, three hundred thirty million, three hundred eleven thousand, two hundred thirty-one".