216124421599 has 2 divisors, whose sum is σ = 216124421600. Its totient is φ = 216124421598.

The previous prime is 216124421593. The next prime is 216124421629. The reversal of 216124421599 is 995124421612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216124421599 - 2⁵ = 216124421567 is a prime.

It is a super-2 number, since 2×216124421599² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216124421593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108062210799 + 108062210800.

It is an arithmetic number, because the mean of its divisors is an integer number (108062210800).

Almost surely, 2^216124421599 is an apocalyptic number.

216124421599 is a deficient number, since it is larger than the sum of its proper divisors (1).

216124421599 is an equidigital number, since it uses as much as digits as its factorization.

216124421599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The spelling of 216124421599 in words is "two hundred sixteen billion, one hundred twenty-four million, four hundred twenty-one thousand, five hundred ninety-nine".