231302132021 has 8 divisors (see below), whose sum is σ = 235247220000. Its totient is φ = 227357867920.

The previous prime is 231302132011. The next prime is 231302132041. The reversal of 231302132021 is 120231203132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231302132021 is a prime.

It is a super-2 number, since 2×231302132021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231302131984 and 231302132002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231302132011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374126 + ... + 776256.

It is an arithmetic number, because the mean of its divisors is an integer number (29405902500).

Almost surely, 2^231302132021 is an apocalyptic number.

It is an amenable number.

231302132021 is a deficient number, since it is larger than the sum of its proper divisors (3945087979).

231302132021 is an equidigital number, since it uses as much as digits as its factorization.

231302132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411939.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231302132021 its reverse (120231203132), we get a palindrome (351533335153).

The spelling of 231302132021 in words is "two hundred thirty-one billion, three hundred two million, one hundred thirty-two thousand, twenty-one".