21122122022212 has 48 divisors (see below), whose sum is σ = 39296898950400. Its totient is φ = 9905527065600.

The previous prime is 21122122022191. The next prime is 21122122022227. The reversal of 21122122022212 is 21222022122112.

It is a super-2 number, since 2×21122122022212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134781333 + ... + 134937955.

It is an arithmetic number, because the mean of its divisors is an integer number (818685394800).

Almost surely, 2^{21122122022212} is an apocalyptic number.

It is an amenable number.

21122122022212 is a deficient number, since it is larger than the sum of its proper divisors (18174776928188).

21122122022212 is a wasteful number, since it uses less digits than its factorization.

21122122022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174316 (or 174314 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21122122022212 its reverse (21222022122112), we get a palindrome (42344144144324).

The spelling of 21122122022212 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, twenty-two thousand, two hundred twelve".