231035411450021 has 4 divisors (see below), whose sum is σ = 231052554404172. Its totient is φ = 231018268495872.

The previous prime is 231035411450017. The next prime is 231035411450113. The reversal of 231035411450021 is 120054114530132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 190817478868900 + 40217932581121 = 13813670^2 + 6341761^2 .

It is a cyclic number.

It is not a de Polignac number, because 231035411450021 - 2² = 231035411450017 is a prime.

It is a super-2 number, since 2×231035411450021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231035411450021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231035411450321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8571456860 + ... + 8571483813.

It is an arithmetic number, because the mean of its divisors is an integer number (57763138601043).

Almost surely, 2^{231035411450021} is an apocalyptic number.

It is an amenable number.

231035411450021 is a deficient number, since it is larger than the sum of its proper divisors (17142954151).

231035411450021 is a wasteful number, since it uses less digits than its factorization.

231035411450021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17142954150.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 231035411450021 its reverse (120054114530132), we get a palindrome (351089525980153).

The spelling of 231035411450021 in words is "two hundred thirty-one trillion, thirty-five billion, four hundred eleven million, four hundred fifty thousand, twenty-one".