21376841251 has 2 divisors, whose sum is σ = 21376841252. Its totient is φ = 21376841250.

The previous prime is 21376841207. The next prime is 21376841257. The reversal of 21376841251 is 15214867312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21376841251 - 2²⁵ = 21343286819 is a prime.

It is not a weakly prime, because it can be changed into another prime (21376841257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10688420625 + 10688420626.

It is an arithmetic number, because the mean of its divisors is an integer number (10688420626).

Almost surely, 2^21376841251 is an apocalyptic number.

21376841251 is a deficient number, since it is larger than the sum of its proper divisors (1).

21376841251 is an equidigital number, since it uses as much as digits as its factorization.

21376841251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The spelling of 21376841251 in words is "twenty-one billion, three hundred seventy-six million, eight hundred forty-one thousand, two hundred fifty-one".