22122222122121 has 48 divisors (see below), whose sum is σ = 32481023877120. Its totient is φ = 13382834018400.

The previous prime is 22122222122083. The next prime is 22122222122177. The reversal of 22122222122121 is 12122122222122.

It is a happy number.

It is not a de Polignac number, because 22122222122121 - 2³⁵ = 22087862383753 is a prime.

It is a super-3 number, since 3×22122222122121³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22122222122091 and 22122222122100.

It is not an unprimeable number, because it can be changed into a prime (22122222112121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 471474700 + ... + 471521618.

It is an arithmetic number, because the mean of its divisors is an integer number (676687997440).

Almost surely, 2^{22122222122121} is an apocalyptic number.

It is an amenable number.

22122222122121 is a deficient number, since it is larger than the sum of its proper divisors (10358801754999).

22122222122121 is a wasteful number, since it uses less digits than its factorization.

22122222122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49298 (or 49287 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

Adding to 22122222122121 its reverse (12122122222122), we get a palindrome (34244344344243).

It can be divided in two parts, 22122222122 and 121, that multiplied together give a palindrome (2676788876762).

The spelling of 22122222122121 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".