21225121122 has 64 divisors (see below), whose sum is σ = 45048009600. Its totient is φ = 6648376320.

The previous prime is 21225121117. The next prime is 21225121139. The reversal of 21225121122 is 22112152212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7608904 + ... + 7611692.

It is an arithmetic number, because the mean of its divisors is an integer number (703875150).

Almost surely, 2^21225121122 is an apocalyptic number.

21225121122 is an abundant number, since it is smaller than the sum of its proper divisors (23822888478).

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

21225121122 is a wasteful number, since it uses less digits than its factorization.

21225121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331.

The product of its digits is 320, while the sum is 21.

Adding to 21225121122 its reverse (22112152212), we get a palindrome (43337273334).

The spelling of 21225121122 in words is "twenty-one billion, two hundred twenty-five million, one hundred twenty-one thousand, one hundred twenty-two".