12583990145921 has 4 divisors (see below), whose sum is σ = 12608051313072. Its totient is φ = 12559928978772.

The previous prime is 12583990145917. The next prime is 12583990145929. The reversal of 12583990145921 is 12954109938521.

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 12583990145921 - 2² = 12583990145917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12583990145929) 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, 12030582791 + ... + 12030583836.

It is an arithmetic number, because the mean of its divisors is an integer number (3152012828268).

Almost surely, 2^{12583990145921} is an apocalyptic number.

It is an amenable number.

12583990145921 is a deficient number, since it is larger than the sum of its proper divisors (24061167151).

12583990145921 is an equidigital number, since it uses as much as digits as its factorization.

12583990145921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24061167150.

The product of its (nonzero) digits is 6998400, while the sum is 59.

The spelling of 12583990145921 in words is "twelve trillion, five hundred eighty-three billion, nine hundred ninety million, one hundred forty-five thousand, nine hundred twenty-one".