22111212210121 has 4 divisors (see below), whose sum is σ = 23274960221200. Its totient is φ = 20947464199044.

The previous prime is 22111212210089. The next prime is 22111212210149. The reversal of 22111212210121 is 12101221211122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22111212210121 - 2⁵ = 22111212210089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1163748011059 = 22111212210121 / (2 + 2 + 1 + 1 + 1 + 2 + 1 + 2 + 2 + 1 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111212210721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581874005511 + ... + 581874005548.

It is an arithmetic number, because the mean of its divisors is an integer number (5818740055300).

Almost surely, 2^{22111212210121} is an apocalyptic number.

It is an amenable number.

22111212210121 is a deficient number, since it is larger than the sum of its proper divisors (1163748011079).

22111212210121 is a wasteful number, since it uses less digits than its factorization.

22111212210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163748011078.

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

Adding to 22111212210121 its reverse (12101221211122), we get a palindrome (34212433421243).

The spelling of 22111212210121 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-one".