12146691251 has 4 divisors (see below), whose sum is σ = 12148288152. Its totient is φ = 12145094352.

The previous prime is 12146691239. The next prime is 12146691287. The reversal of 12146691251 is 15219664121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15219664121 = 23 ⋅661724527.

It is a cyclic number.

It is not a de Polignac number, because 12146691251 - 2¹⁴ = 12146674867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12146694251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786986 + ... + 802271.

It is an arithmetic number, because the mean of its divisors is an integer number (3037072038).

Almost surely, 2^12146691251 is an apocalyptic number.

12146691251 is a deficient number, since it is larger than the sum of its proper divisors (1596901).

12146691251 is an equidigital number, since it uses as much as digits as its factorization.

12146691251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596900.

The product of its digits is 25920, while the sum is 38.

The spelling of 12146691251 in words is "twelve billion, one hundred forty-six million, six hundred ninety-one thousand, two hundred fifty-one".