21221113424299 has 16 divisors (see below), whose sum is σ = 21900952523520. Its totient is φ = 20554672791520.

The previous prime is 21221113424249. The next prime is 21221113424333. The reversal of 21221113424299 is 99242431112212.

It is a cyclic number.

It is not a de Polignac number, because 21221113424299 - 2¹⁵ = 21221113391531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221113424219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9004012 + ... + 11113705.

It is an arithmetic number, because the mean of its divisors is an integer number (1368809532720).

Almost surely, 2^{21221113424299} is an apocalyptic number.

21221113424299 is a deficient number, since it is larger than the sum of its proper divisors (679839099221).

21221113424299 is a wasteful number, since it uses less digits than its factorization.

21221113424299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20118050.

The product of its digits is 124416, while the sum is 43.

The spelling of 21221113424299 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred thirteen million, four hundred twenty-four thousand, two hundred ninety-nine".