21020021202199 has 8 divisors (see below), whose sum is σ = 21934060045920. Its totient is φ = 20105992765056.

The previous prime is 21020021202181. The next prime is 21020021202223. The reversal of 21020021202199 is 99120212002012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21020021202199 - 2⁹ = 21020021201687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21020021202199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020021202109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1675579 + ... + 6696835.

It is an arithmetic number, because the mean of its divisors is an integer number (2741757505740).

Almost surely, 2^{21020021202199} is an apocalyptic number.

21020021202199 is a deficient number, since it is larger than the sum of its proper divisors (914038843721).

21020021202199 is a wasteful number, since it uses less digits than its factorization.

21020021202199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203289.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 21020021202199 in words is "twenty-one trillion, twenty billion, twenty-one million, two hundred two thousand, one hundred ninety-nine".