21022021211199 has 4 divisors (see below), whose sum is σ = 28029361614936. Its totient is φ = 14014680807464.

The previous prime is 21022021211197. The next prime is 21022021211203. The reversal of 21022021211199 is 99111212022012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21022021211199 - 2¹ = 21022021211197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022021211197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503670201864 + ... + 3503670201869.

It is an arithmetic number, because the mean of its divisors is an integer number (7007340403734).

Almost surely, 2^{21022021211199} is an apocalyptic number.

21022021211199 is a deficient number, since it is larger than the sum of its proper divisors (7007340403737).

21022021211199 is an equidigital number, since it uses as much as digits as its factorization.

21022021211199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007340403736.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 21022021211199 in words is "twenty-one trillion, twenty-two billion, twenty-one million, two hundred eleven thousand, one hundred ninety-nine".