22121111122211 has 4 divisors (see below), whose sum is σ = 22289974566024. Its totient is φ = 21952247678400.

The previous prime is 22121111122207. The next prime is 22121111122217. The reversal of 22121111122211 is 11222111112122.

It is a happy number.

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 22121111122211 - 2² = 22121111122207 is a prime.

It is a super-4 number, since 4×22121111122211⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121111122217) 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, 84431721710 + ... + 84431721971.

It is an arithmetic number, because the mean of its divisors is an integer number (5572493641506).

Almost surely, 2^{22121111122211} is an apocalyptic number.

22121111122211 is a deficient number, since it is larger than the sum of its proper divisors (168863443813).

22121111122211 is a wasteful number, since it uses less digits than its factorization.

22121111122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168863443812.

The product of its digits is 64, while the sum is 20.

Adding to 22121111122211 its reverse (11222111112122), we get a palindrome (33343222234333).

The spelling of 22121111122211 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred eleven".