201031212231 has 16 divisors (see below), whose sum is σ = 301593945600. Its totient is φ = 132324340824.

The previous prime is 201031212209. The next prime is 201031212251. The reversal of 201031212231 is 132212130102.

201031212231 is a `hidden beast` number, since 201 + 0 + 312 + 122 + 31 = 666.

It is not a de Polignac number, because 201031212231 - 2⁵ = 201031212199 is a prime.

It is a super-2 number, since 2×201031212231² (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 (201031212251) 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, 47121921 + ... + 47126186.

It is an arithmetic number, because the mean of its divisors is an integer number (18849621600).

Almost surely, 2^201031212231 is an apocalyptic number.

201031212231 is a deficient number, since it is larger than the sum of its proper divisors (100562733369).

201031212231 is an equidigital number, since it uses as much as digits as its factorization.

201031212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94248195 (or 94248189 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201031212231 its reverse (132212130102), we get a palindrome (333243342333).

The spelling of 201031212231 in words is "two hundred one billion, thirty-one million, two hundred twelve thousand, two hundred thirty-one".