21020122011199 has 64 divisors (see below), whose sum is σ = 22671550826496. Its totient is φ = 19443733264384.

The previous prime is 21020122011173. The next prime is 21020122011221. The reversal of 21020122011199 is 99111022102012.

It is a cyclic number.

It is not a de Polignac number, because 21020122011199 - 2⁵ = 21020122011167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21020122011199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020122011139) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24527563179 + ... + 24527564035.

It is an arithmetic number, because the mean of its divisors is an integer number (354242981664).

Almost surely, 2^{21020122011199} is an apocalyptic number.

21020122011199 is a deficient number, since it is larger than the sum of its proper divisors (1651428815297).

21020122011199 is a wasteful number, since it uses less digits than its factorization.

21020122011199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 21020122011199 in words is "twenty-one trillion, twenty billion, one hundred twenty-two million, eleven thousand, one hundred ninety-nine".