22121212112211 has 16 divisors (see below), whose sum is σ = 29907000365216. Its totient is φ = 14541557550336.

The previous prime is 22121212112189. The next prime is 22121212112257. The reversal of 22121212112211 is 11221121212122.

It is not a de Polignac number, because 22121212112211 - 2⁶ = 22121212112147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121212112711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12711820 + ... + 14346873.

It is an arithmetic number, because the mean of its divisors is an integer number (1869187522826).

Almost surely, 2^{22121212112211} is an apocalyptic number.

22121212112211 is a deficient number, since it is larger than the sum of its proper divisors (7785788253005).

22121212112211 is a wasteful number, since it uses less digits than its factorization.

22121212112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27062502.

The product of its digits is 128, while the sum is 21.

Adding to 22121212112211 its reverse (11221121212122), we get a palindrome (33342333324333).

The spelling of 22121212112211 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, two hundred eleven".