201021003131231 has 4 divisors (see below), whose sum is σ = 203565572791200. Its totient is φ = 198476433471264.

The previous prime is 201021003131183. The next prime is 201021003131233. The reversal of 201021003131231 is 132131300120102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201021003131231 - 2¹⁸ = 201021002869087 is a prime.

It is a super-2 number, since 2×201021003131231² (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 (201021003131233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272284829866 + ... + 1272284830023.

It is an arithmetic number, because the mean of its divisors is an integer number (50891393197800).

Almost surely, 2^{201021003131231} is an apocalyptic number.

201021003131231 is a deficient number, since it is larger than the sum of its proper divisors (2544569659969).

201021003131231 is an equidigital number, since it uses as much as digits as its factorization.

201021003131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544569659968.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 201021003131231 its reverse (132131300120102), we get a palindrome (333152303251333).

The spelling of 201021003131231 in words is "two hundred one trillion, twenty-one billion, three million, one hundred thirty-one thousand, two hundred thirty-one".