21213301993711 has 2 divisors, whose sum is σ = 21213301993712. Its totient is φ = 21213301993710.

The previous prime is 21213301993693. The next prime is 21213301993811. The reversal of 21213301993711 is 11739910331212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21213301993711 - 2⁵ = 21213301993679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213301993811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606650996855 + 10606650996856.

It is an arithmetic number, because the mean of its divisors is an integer number (10606650996856).

Almost surely, 2^{21213301993711} is an apocalyptic number.

21213301993711 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213301993711 is an equidigital number, since it uses as much as digits as its factorization.

21213301993711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 21213301993711 in words is "twenty-one trillion, two hundred thirteen billion, three hundred one million, nine hundred ninety-three thousand, seven hundred eleven".