22221011222121 has 8 divisors (see below), whose sum is σ = 29629859745024. Its totient is φ = 14813085090320.

The previous prime is 22221011222107. The next prime is 22221011222173. The reversal of 22221011222121 is 12122211012222.

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 22221011222121 - 2²⁶ = 22220944113257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22221011222191) 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, 230541561 + ... + 230637926.

It is an arithmetic number, because the mean of its divisors is an integer number (3703732468128).

Almost surely, 2^{22221011222121} is an apocalyptic number.

It is an amenable number.

22221011222121 is a deficient number, since it is larger than the sum of its proper divisors (7408848522903).

22221011222121 is a wasteful number, since it uses less digits than its factorization.

22221011222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461195551.

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

Adding to 22221011222121 its reverse (12122211012222), we get a palindrome (34343222234343).

The spelling of 22221011222121 in words is "twenty-two trillion, two hundred twenty-one billion, eleven million, two hundred twenty-two thousand, one hundred twenty-one".