201231002121031 has 12 divisors (see below), whose sum is σ = 208415798721000. Its totient is φ = 194285923085408.

The previous prime is 201231002120999. The next prime is 201231002121053. The reversal of 201231002121031 is 130121200132102.

It is not a de Polignac number, because 201231002121031 - 2⁵ = 201231002120999 is a prime.

It is a super-2 number, since 2×201231002121031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201231002121631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23268105 + ... + 30722413.

It is an arithmetic number, because the mean of its divisors is an integer number (17367983226750).

Almost surely, 2^{201231002121031} is an apocalyptic number.

201231002121031 is a deficient number, since it is larger than the sum of its proper divisors (7184796599969).

201231002121031 is an equidigital number, since it uses as much as digits as its factorization.

201231002121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7486466 (or 7486437 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201231002121031 its reverse (130121200132102), we get a palindrome (331352202253133).

The spelling of 201231002121031 in words is "two hundred one trillion, two hundred thirty-one billion, two million, one hundred twenty-one thousand, thirty-one".