201231020331 has 128 divisors (see below), whose sum is σ = 361562849280. Its totient is φ = 109109721600.

The previous prime is 201231020231. The next prime is 201231020339. The reversal of 201231020331 is 133020132102.

201231020331 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 310 + 20 + 331 = 666.

It is not a de Polignac number, because 201231020331 - 2⁷ = 201231020203 is a prime.

It is a super-2 number, since 2×201231020331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201231020339) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18923386 + ... + 18934016.

It is an arithmetic number, because the mean of its divisors is an integer number (2824709760).

Almost surely, 2^201231020331 is an apocalyptic number.

201231020331 is a deficient number, since it is larger than the sum of its proper divisors (160331828949).

201231020331 is a wasteful number, since it uses less digits than its factorization.

201231020331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10854 (or 10848 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 201231020331 its reverse (133020132102), we get a palindrome (334251152433).

The spelling of 201231020331 in words is "two hundred one billion, two hundred thirty-one million, twenty thousand, three hundred thirty-one".