22110112122121 has 8 divisors (see below), whose sum is σ = 23794489035144. Its totient is φ = 20468377662720.

The previous prime is 22110112122103. The next prime is 22110112122151. The reversal of 22110112122121 is 12122121101122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41538923721 + 22068573198400 = 203811^2 + 4697720^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22110112122121 - 2¹⁷ = 22110111991049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22110112122151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10660612330 + ... + 10660614403.

It is an arithmetic number, because the mean of its divisors is an integer number (2974311129393).

Almost surely, 2^{22110112122121} is an apocalyptic number.

It is an amenable number.

22110112122121 is a deficient number, since it is larger than the sum of its proper divisors (1684376913023).

22110112122121 is a wasteful number, since it uses less digits than its factorization.

22110112122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21321226811.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22110112122121 its reverse (12122121101122), we get a palindrome (34232233223243).

The spelling of 22110112122121 in words is "twenty-two trillion, one hundred ten billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".