231000332021 has 4 divisors (see below), whose sum is σ = 231245816844. Its totient is φ = 230754847200.

The previous prime is 231000332011. The next prime is 231000332023. The reversal of 231000332021 is 120233000132.

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 171835120900 + 59165211121 = 414530^2 + 243239^2 .

It is a cyclic number.

It is not a de Polignac number, because 231000332021 - 2¹⁰ = 231000330997 is a prime.

It is a super-2 number, since 2×231000332021² (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 (231000332023) 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, 122741000 + ... + 122742881.

It is an arithmetic number, because the mean of its divisors is an integer number (57811454211).

Almost surely, 2^231000332021 is an apocalyptic number.

It is an amenable number.

231000332021 is a deficient number, since it is larger than the sum of its proper divisors (245484823).

231000332021 is an equidigital number, since it uses as much as digits as its factorization.

231000332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245484822.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231000332021 its reverse (120233000132), we get a palindrome (351233332153).

The spelling of 231000332021 in words is "two hundred thirty-one billion, three hundred thirty-two thousand, twenty-one".