21012433199663 has 2 divisors, whose sum is σ = 21012433199664. Its totient is φ = 21012433199662.

The previous prime is 21012433199629. The next prime is 21012433199671. The reversal of 21012433199663 is 36699133421012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012433199663 - 2¹⁴ = 21012433183279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012433099663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506216599831 + 10506216599832.

It is an arithmetic number, because the mean of its divisors is an integer number (10506216599832).

Almost surely, 2^{21012433199663} is an apocalyptic number.

21012433199663 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012433199663 is an equidigital number, since it uses as much as digits as its factorization.

21012433199663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 21012433199663 in words is "twenty-one trillion, twelve billion, four hundred thirty-three million, one hundred ninety-nine thousand, six hundred sixty-three".