21214064266433 has 2 divisors, whose sum is σ = 21214064266434. Its totient is φ = 21214064266432.

The previous prime is 21214064266429. The next prime is 21214064266441. The reversal of 21214064266433 is 33466246041212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11585902093249 + 9628162173184 = 3403807^2 + 3102928^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214064266433 - 2² = 21214064266429 is a prime.

It is not a weakly prime, because it can be changed into another prime (21214064266333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607032133216 + 10607032133217.

It is an arithmetic number, because the mean of its divisors is an integer number (10607032133217).

Almost surely, 2^{21214064266433} is an apocalyptic number.

It is an amenable number.

21214064266433 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214064266433 is an equidigital number, since it uses as much as digits as its factorization.

21214064266433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 21214064266433 in words is "twenty-one trillion, two hundred fourteen billion, sixty-four million, two hundred sixty-six thousand, four hundred thirty-three".