22212221211 has 24 divisors (see below), whose sum is σ = 32960687760. Its totient is φ = 14403894336.

The previous prime is 22212221201. The next prime is 22212221221. The reversal of 22212221211 is 11212221222.

It is a happy number.

22212221211 is a `hidden beast` number, since 22 + 212 + 221 + 211 = 666.

It is an interprime number because it is at equal distance from previous prime (22212221201) and next prime (22212221221).

It is not a de Polignac number, because 22212221211 - 2⁶ = 22212221147 is a prime.

It is a super-2 number, since 2×22212221211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22212221201) 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, 1595800 + ... + 1609658.

It is an arithmetic number, because the mean of its divisors is an integer number (1373361990).

Almost surely, 2^22212221211 is an apocalyptic number.

22212221211 is a deficient number, since it is larger than the sum of its proper divisors (10748466549).

22212221211 is a wasteful number, since it uses less digits than its factorization.

22212221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18715 (or 18712 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 22212221211 its reverse (11212221222), we get a palindrome (33424442433).

The spelling of 22212221211 in words is "twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred eleven".