21220021000199 has 16 divisors (see below), whose sum is σ = 24398341231680. Its totient is φ = 18078697328640.

The previous prime is 21220021000159. The next prime is 21220021000201. The reversal of 21220021000199 is 99100012002212.

It is a cyclic number.

It is not a de Polignac number, because 21220021000199 - 2⁴⁴ = 3627834955783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220021000109) 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, 10504682 + ... + 12360759.

It is an arithmetic number, because the mean of its divisors is an integer number (1524896326980).

Almost surely, 2^{21220021000199} is an apocalyptic number.

21220021000199 is a deficient number, since it is larger than the sum of its proper divisors (3178320231481).

21220021000199 is a wasteful number, since it uses less digits than its factorization.

21220021000199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22866250.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21220021000199 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, one hundred ninety-nine", and thus it is an aban number.