21022112021122 has 16 divisors (see below), whose sum is σ = 31930211057472. Its totient is φ = 10379340067120.

The previous prime is 21022112021117. The next prime is 21022112021147. The reversal of 21022112021122 is 22112021122012.

It is a self number, because there is not a number n which added to its sum of digits gives 21022112021122.

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, 157866193 + ... + 157999300.

It is an arithmetic number, because the mean of its divisors is an integer number (1995638191092).

Almost surely, 2^{21022112021122} is an apocalyptic number.

21022112021122 is a deficient number, since it is larger than the sum of its proper divisors (10908099036350).

21022112021122 is a wasteful number, since it uses less digits than its factorization.

21022112021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315865913.

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

Adding to 21022112021122 its reverse (22112021122012), we get a palindrome (43134133143134).

The spelling of 21022112021122 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, twenty-one thousand, one hundred twenty-two".