21222021121122 has 16 divisors (see below), whose sum is σ = 42449621936832. Its totient is φ = 7073077091280.

The previous prime is 21222021121061. The next prime is 21222021121139. The reversal of 21222021121122 is 22112112022212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232437829 + ... + 232529112.

It is an arithmetic number, because the mean of its divisors is an integer number (2653101371052).

Almost surely, 2^{21222021121122} is an apocalyptic number.

21222021121122 is an abundant number, since it is smaller than the sum of its proper divisors (21227600815710).

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

21222021121122 is a wasteful number, since it uses less digits than its factorization.

21222021121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464974553.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21222021121122 its reverse (22112112022212), we get a palindrome (43334133143334).

The spelling of 21222021121122 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".