21122422122 has 32 divisors (see below), whose sum is σ = 42545949120. Its totient is φ = 6990802560.

The previous prime is 21122422109. The next prime is 21122422129. The reversal of 21122422122 is 22122422112.

It is not an unprimeable number, because it can be changed into a prime (21122422129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455004 + ... + 499272.

It is an arithmetic number, because the mean of its divisors is an integer number (1329560910).

Almost surely, 2^21122422122 is an apocalyptic number.

21122422122 is an abundant number, since it is smaller than the sum of its proper divisors (21423526998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122422122 is a wasteful number, since it uses less digits than its factorization.

21122422122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44838.

The product of its digits is 512, while the sum is 21.

Adding to 21122422122 its reverse (22122422112), we get a palindrome (43244844234).

The spelling of 21122422122 in words is "twenty-one billion, one hundred twenty-two million, four hundred twenty-two thousand, one hundred twenty-two".