21022120211122 has 4 divisors (see below), whose sum is σ = 31533180316686. Its totient is φ = 10511060105560.

The previous prime is 21022120211101. The next prime is 21022120211149. The reversal of 21022120211122 is 22111202122012.

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

It can be written as a sum of positive squares in only one way, i.e., 20301864166081 + 720256045041 = 4505759^2 + 848679^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21022120211122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255530052779 + ... + 5255530052782.

Almost surely, 2^{21022120211122} is an apocalyptic number.

21022120211122 is a deficient number, since it is larger than the sum of its proper divisors (10511060105564).

21022120211122 is a wasteful number, since it uses less digits than its factorization.

21022120211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511060105563.

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

Adding to 21022120211122 its reverse (22111202122012), we get a palindrome (43133322333134).

The spelling of 21022120211122 in words is "twenty-one trillion, twenty-two billion, one hundred twenty million, two hundred eleven thousand, one hundred twenty-two".