12907270921 has 2 divisors, whose sum is σ = 12907270922. Its totient is φ = 12907270920.

The previous prime is 12907270919. The next prime is 12907270933.

12907270921 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12873398521 + 33872400 = 113461^2 + 5820^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12907270921 - 2¹ = 12907270919 is a prime.

Together with 12907270919, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (12907270951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6453635460 + 6453635461.

It is an arithmetic number, because the mean of its divisors is an integer number (6453635461).

Almost surely, 2^12907270921 is an apocalyptic number.

It is an amenable number.

12907270921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12907270921 is an equidigital number, since it uses as much as digits as its factorization.

12907270921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 12907270921 in words is "twelve billion, nine hundred seven million, two hundred seventy thousand, nine hundred twenty-one".