231302101021 has 4 divisors (see below), whose sum is σ = 231306164892. Its totient is φ = 231298037152.

The previous prime is 231302101013. The next prime is 231302101039. The reversal of 231302101021 is 120101203132.

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 9319778521 + 221982322500 = 96539^2 + 471150^2 .

It is a cyclic number.

It is not a de Polignac number, because 231302101021 - 2³ = 231302101013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231302100986 and 231302101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231302101321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1945330 + ... + 2060803.

It is an arithmetic number, because the mean of its divisors is an integer number (57826541223).

Almost surely, 2^231302101021 is an apocalyptic number.

It is an amenable number.

231302101021 is a deficient number, since it is larger than the sum of its proper divisors (4063871).

231302101021 is an equidigital number, since it uses as much as digits as its factorization.

231302101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063870.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231302101021 its reverse (120101203132), we get a palindrome (351403304153).

The spelling of 231302101021 in words is "two hundred thirty-one billion, three hundred two million, one hundred one thousand, twenty-one".