12023611621 has 12 divisors (see below), whose sum is σ = 13989084780. Its totient is φ = 10304159040.

The previous prime is 12023611619. The next prime is 12023611631. The reversal of 12023611621 is 12611632021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10062096100 + 1961515521 = 100310^2 + 44289^2 .

It is not a de Polignac number, because 12023611621 - 2¹ = 12023611619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023611631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317275 + ... + 353143.

It is an arithmetic number, because the mean of its divisors is an integer number (1165757065).

Almost surely, 2^12023611621 is an apocalyptic number.

It is an amenable number.

12023611621 is a deficient number, since it is larger than the sum of its proper divisors (1965473159).

12023611621 is an equidigital number, since it uses as much as digits as its factorization.

12023611621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42724 (or 42717 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 12023611621 in words is "twelve billion, twenty-three million, six hundred eleven thousand, six hundred twenty-one".