21214040434079 has 2 divisors, whose sum is σ = 21214040434080. Its totient is φ = 21214040434078.

The previous prime is 21214040434061. The next prime is 21214040434121. The reversal of 21214040434079 is 97043404041212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21214040434079 - 2⁸ = 21214040433823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214040494079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607020217039 + 10607020217040.

It is an arithmetic number, because the mean of its divisors is an integer number (10607020217040).

Almost surely, 2^{21214040434079} is an apocalyptic number.

21214040434079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214040434079 is an equidigital number, since it uses as much as digits as its factorization.

21214040434079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 21214040434079 in words is "twenty-one trillion, two hundred fourteen billion, forty million, four hundred thirty-four thousand, seventy-nine".