22121011121211 has 24 divisors (see below), whose sum is σ = 33148472373744. Its totient is φ = 14741789944320.

The previous prime is 22121011121203. The next prime is 22121011121213. The reversal of 22121011121211 is 11212111012122.

It is a happy number.

22121011121211 is a `hidden beast` number, since 221 + 210 + 1 + 1 + 1 + 21 + 211 = 666.

It is not a de Polignac number, because 22121011121211 - 2³ = 22121011121203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121011121213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16485130 + ... + 17776431.

It is an arithmetic number, because the mean of its divisors is an integer number (1381186348906).

Almost surely, 2^{22121011121211} is an apocalyptic number.

22121011121211 is a deficient number, since it is larger than the sum of its proper divisors (11027461252533).

22121011121211 is an equidigital number, since it uses as much as digits as its factorization.

22121011121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34264233 (or 34264221 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22121011121211 its reverse (11212111012122), we get a palindrome (33333122133333).

The spelling of 22121011121211 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred eleven".