21112021202122 has 16 divisors (see below), whose sum is σ = 33388797536640. Its totient is φ = 9984222930528.

The previous prime is 21112021202119. The next prime is 21112021202183. The reversal of 21112021202122 is 22120212021112.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21112021202122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450203058 + ... + 450249949.

It is an arithmetic number, because the mean of its divisors is an integer number (2086799846040).

Almost surely, 2^{21112021202122} is an apocalyptic number.

21112021202122 is a deficient number, since it is larger than the sum of its proper divisors (12276776334518).

21112021202122 is a wasteful number, since it uses less digits than its factorization.

21112021202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900453645.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21112021202122 its reverse (22120212021112), we get a palindrome (43232233223234).

The spelling of 21112021202122 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, two hundred two thousand, one hundred twenty-two".