231301244021 has 4 divisors (see below), whose sum is σ = 241357819872. Its totient is φ = 221244668172.

The previous prime is 231301244017. The next prime is 231301244023. The reversal of 231301244021 is 120442103132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231301244021 - 2² = 231301244017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 10056575827 = 231301244021 / (2 + 3 + 1 + 3 + 0 + 1 + 2 + 4 + 4 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231301244023) 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, 5028287891 + ... + 5028287936.

It is an arithmetic number, because the mean of its divisors is an integer number (60339454968).

Almost surely, 2^231301244021 is an apocalyptic number.

It is an amenable number.

231301244021 is a deficient number, since it is larger than the sum of its proper divisors (10056575851).

231301244021 is a wasteful number, since it uses less digits than its factorization.

231301244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10056575850.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 231301244021 its reverse (120442103132), we get a palindrome (351743347153).

The spelling of 231301244021 in words is "two hundred thirty-one billion, three hundred one million, two hundred forty-four thousand, twenty-one".