231534041021 has 16 divisors (see below), whose sum is σ = 252160166400. Its totient is φ = 211754088000.

The previous prime is 231534040993. The next prime is 231534041027. The reversal of 231534041021 is 120140435132.

It is a happy number.

It is not a de Polignac number, because 231534041021 - 2¹⁸ = 231533778877 is a prime.

It is a super-2 number, since 2×231534041021² (a number of 24 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 (231534041027) 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, 4437716 + ... + 4489586.

It is an arithmetic number, because the mean of its divisors is an integer number (15760010400).

Almost surely, 2^231534041021 is an apocalyptic number.

It is an amenable number.

231534041021 is a deficient number, since it is larger than the sum of its proper divisors (20626125379).

231534041021 is a wasteful number, since it uses less digits than its factorization.

231534041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60020.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 231534041021 its reverse (120140435132), we get a palindrome (351674476153).

The spelling of 231534041021 in words is "two hundred thirty-one billion, five hundred thirty-four million, forty-one thousand, twenty-one".