231210430134021 has 40 divisors (see below), whose sum is σ = 371961088550744. Its totient is φ = 142281685969920.

The previous prime is 231210430134001. The next prime is 231210430134109. The reversal of 231210430134021 is 120431034012132.

231210430134021 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 10 + 4 + 301 + 340 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7109081033796 + 224101349100225 = 2666286^2 + 14970015^2 .

It is not a de Polignac number, because 231210430134021 - 2²⁹ = 231209893263109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231210430134001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 92527185 + ... + 94993161.

Almost surely, 2^{231210430134021} is an apocalyptic number.

It is an amenable number.

231210430134021 is a deficient number, since it is larger than the sum of its proper divisors (140750658416723).

231210430134021 is a wasteful number, since it uses less digits than its factorization.

231210430134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555043 (or 2555034 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 231210430134021 its reverse (120431034012132), we get a palindrome (351641464146153).

The spelling of 231210430134021 in words is "two hundred thirty-one trillion, two hundred ten billion, four hundred thirty million, one hundred thirty-four thousand, twenty-one".