22222121212111 has 4 divisors (see below), whose sum is σ = 22586418281224. Its totient is φ = 21857824143000.

The previous prime is 22222121212091. The next prime is 22222121212129. The reversal of 22222121212111 is 11121212122222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22222121212111 - 2⁵ = 22222121212079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222121213111) 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, 182148534465 + ... + 182148534586.

It is an arithmetic number, because the mean of its divisors is an integer number (5646604570306).

Almost surely, 2^{22222121212111} is an apocalyptic number.

22222121212111 is a deficient number, since it is larger than the sum of its proper divisors (364297069113).

22222121212111 is an equidigital number, since it uses as much as digits as its factorization.

22222121212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364297069112.

The product of its digits is 256, while the sum is 22.

Adding to 22222121212111 its reverse (11121212122222), we get a palindrome (33343333334333).

The spelling of 22222121212111 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred eleven".