21114587920711 has 2 divisors, whose sum is σ = 21114587920712. Its totient is φ = 21114587920710.

The previous prime is 21114587920669. The next prime is 21114587920721. The reversal of 21114587920711 is 11702978541112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21114587920711 is a prime.

It is a super-2 number, since 2×21114587920711² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114587920721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557293960355 + 10557293960356.

It is an arithmetic number, because the mean of its divisors is an integer number (10557293960356).

Almost surely, 2^{21114587920711} is an apocalyptic number.

21114587920711 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114587920711 is an equidigital number, since it uses as much as digits as its factorization.

21114587920711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 49.

The spelling of 21114587920711 in words is "twenty-one trillion, one hundred fourteen billion, five hundred eighty-seven million, nine hundred twenty thousand, seven hundred eleven".