201231102331 has 16 divisors (see below), whose sum is σ = 243849576960. Its totient is φ = 162212950080.

The previous prime is 201231102301. The next prime is 201231102337. The reversal of 201231102331 is 133201132102.

It is a cyclic number.

It is not a de Polignac number, because 201231102331 - 2⁵ = 201231102299 is a prime.

It is a super-2 number, since 2×201231102331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201231102299 and 201231102308.

It is not an unprimeable number, because it can be changed into a prime (201231102337) 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, 5503735 + ... + 5540176.

It is an arithmetic number, because the mean of its divisors is an integer number (15240598560).

Almost surely, 2^201231102331 is an apocalyptic number.

201231102331 is a deficient number, since it is larger than the sum of its proper divisors (42618474629).

201231102331 is a wasteful number, since it uses less digits than its factorization.

201231102331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11044074.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201231102331 its reverse (133201132102), we get a palindrome (334432234433).

The spelling of 201231102331 in words is "two hundred one billion, two hundred thirty-one million, one hundred two thousand, three hundred thirty-one".