21222342021142 has 16 divisors (see below), whose sum is σ = 31937900868720. Its totient is φ = 10576376571168.

The previous prime is 21222342021109. The next prime is 21222342021161. The reversal of 21222342021142 is 24112024322212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222342021142.

It is a congruent number.

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, 29805984 + ... + 30509692.

It is an arithmetic number, because the mean of its divisors is an integer number (1996118804295).

Almost surely, 2^{21222342021142} is an apocalyptic number.

21222342021142 is a deficient number, since it is larger than the sum of its proper divisors (10715558847578).

21222342021142 is a wasteful number, since it uses less digits than its factorization.

21222342021142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753135.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21222342021142 its reverse (24112024322212), we get a palindrome (45334366343354).

The spelling of 21222342021142 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred forty-two million, twenty-one thousand, one hundred forty-two".