12251613091 has 4 divisors (see below), whose sum is σ = 12972296232. Its totient is φ = 11530929952.

The previous prime is 12251613037. The next prime is 12251613107. The reversal of 12251613091 is 19031615221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19031615221 = 19 ⋅1001663959.

It is a cyclic number.

It is not a de Polignac number, because 12251613091 - 2²¹ = 12249515939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12251613391) 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, 360341545 + ... + 360341578.

It is an arithmetic number, because the mean of its divisors is an integer number (3243074058).

Almost surely, 2^12251613091 is an apocalyptic number.

12251613091 is a deficient number, since it is larger than the sum of its proper divisors (720683141).

12251613091 is an equidigital number, since it uses as much as digits as its factorization.

12251613091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720683140.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 12251613091 in words is "twelve billion, two hundred fifty-one million, six hundred thirteen thousand, ninety-one".