22212111211 has 2 divisors, whose sum is σ = 22212111212. Its totient is φ = 22212111210.

The previous prime is 22212111137. The next prime is 22212111221. The reversal of 22212111211 is 11211121222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22212111211 - 2⁷ = 22212111083 is a prime.

It is not a weakly prime, because it can be changed into another prime (22212111221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106055605 + 11106055606.

It is an arithmetic number, because the mean of its divisors is an integer number (11106055606).

Almost surely, 2^22212111211 is an apocalyptic number.

22212111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212111211 is an equidigital number, since it uses as much as digits as its factorization.

22212111211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 16.

Adding to 22212111211 its reverse (11211121222), we get a palindrome (33423232433).

It can be divided in two parts, 222121 and 11211, that added together give a palindrome (233332).

The spelling of 22212111211 in words is "twenty-two billion, two hundred twelve million, one hundred eleven thousand, two hundred eleven".