12007809962921 has 2 divisors, whose sum is σ = 12007809962922. Its totient is φ = 12007809962920.

The previous prime is 12007809962843. The next prime is 12007809962923. The reversal of 12007809962921 is 12926990870021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11785248691225 + 222561271696 = 3432965^2 + 471764^2 .

It is a cyclic number.

It is not a de Polignac number, because 12007809962921 - 2¹⁰ = 12007809961897 is a prime.

Together with 12007809962923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12007809962923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6003904981460 + 6003904981461.

It is an arithmetic number, because the mean of its divisors is an integer number (6003904981461).

Almost surely, 2^{12007809962921} is an apocalyptic number.

It is an amenable number.

12007809962921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12007809962921 is an equidigital number, since it uses as much as digits as its factorization.

12007809962921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 12007809962921 in words is "twelve trillion, seven billion, eight hundred nine million, nine hundred sixty-two thousand, nine hundred twenty-one".