12367862921 has 2 divisors, whose sum is σ = 12367862922. Its totient is φ = 12367862920.

The previous prime is 12367862891. The next prime is 12367862959. The reversal of 12367862921 is 12926876321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11539056400 + 828806521 = 107420^2 + 28789^2 .

It is an emirp because it is prime and its reverse (12926876321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12367862921 - 2²² = 12363668617 is a prime.

It is not a weakly prime, because it can be changed into another prime (12367862621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6183931460 + 6183931461.

It is an arithmetic number, because the mean of its divisors is an integer number (6183931461).

Almost surely, 2^12367862921 is an apocalyptic number.

It is an amenable number.

12367862921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12367862921 is an equidigital number, since it uses as much as digits as its factorization.

12367862921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 12367862921 in words is "twelve billion, three hundred sixty-seven million, eight hundred sixty-two thousand, nine hundred twenty-one".