21073766301971 has 2 divisors, whose sum is σ = 21073766301972. Its totient is φ = 21073766301970.

The previous prime is 21073766301967. The next prime is 21073766302019. The reversal of 21073766301971 is 17910366737012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21073766301971 - 2² = 21073766301967 is a prime.

It is not a weakly prime, because it can be changed into another prime (21073766301901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536883150985 + 10536883150986.

It is an arithmetic number, because the mean of its divisors is an integer number (10536883150986).

Almost surely, 2^{21073766301971} is an apocalyptic number.

21073766301971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073766301971 is an equidigital number, since it uses as much as digits as its factorization.

21073766301971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The spelling of 21073766301971 in words is "twenty-one trillion, seventy-three billion, seven hundred sixty-six million, three hundred one thousand, nine hundred seventy-one".