12251146321 has 2 divisors, whose sum is σ = 12251146322. Its totient is φ = 12251146320.

The previous prime is 12251146319. The next prime is 12251146337. The reversal of 12251146321 is 12364115221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8599965696 + 3651180625 = 92736^2 + 60425^2 .

It is a cyclic number.

It is not a de Polignac number, because 12251146321 - 2¹ = 12251146319 is a prime.

Together with 12251146319, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12251146321.

It is not a weakly prime, because it can be changed into another prime (12251146381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6125573160 + 6125573161.

It is an arithmetic number, because the mean of its divisors is an integer number (6125573161).

Almost surely, 2^12251146321 is an apocalyptic number.

It is an amenable number.

12251146321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12251146321 is an equidigital number, since it uses as much as digits as its factorization.

12251146321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The spelling of 12251146321 in words is "twelve billion, two hundred fifty-one million, one hundred forty-six thousand, three hundred twenty-one".