231204012621 has 4 divisors (see below), whose sum is σ = 308272016832. Its totient is φ = 154136008412.

The previous prime is 231204012601. The next prime is 231204012643. The reversal of 231204012621 is 126210402132.

231204012621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 231204012621 - 2¹¹ = 231204010573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231204012591 and 231204012600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231204012601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38534002101 + ... + 38534002106.

It is an arithmetic number, because the mean of its divisors is an integer number (77068004208).

Almost surely, 2^231204012621 is an apocalyptic number.

It is an amenable number.

231204012621 is a deficient number, since it is larger than the sum of its proper divisors (77068004211).

231204012621 is an equidigital number, since it uses as much as digits as its factorization.

231204012621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77068004210.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 231204012621 its reverse (126210402132), we get a palindrome (357414414753).

The spelling of 231204012621 in words is "two hundred thirty-one billion, two hundred four million, twelve thousand, six hundred twenty-one".