222121112211 has 24 divisors (see below), whose sum is σ = 329635094880. Its totient is φ = 144025174656.

The previous prime is 222121112201. The next prime is 222121112231. The reversal of 222121112211 is 112211121222.

222121112211 is a `hidden beast` number, since 222 + 121 + 112 + 211 = 666.

It is not a de Polignac number, because 222121112211 - 2¹⁰ = 222121111187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222121112201) 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, 786546 + ... + 1030968.

It is an arithmetic number, because the mean of its divisors is an integer number (13734795620).

Almost surely, 2^222121112211 is an apocalyptic number.

222121112211 is a deficient number, since it is larger than the sum of its proper divisors (107513982669).

222121112211 is a wasteful number, since it uses less digits than its factorization.

222121112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247195 (or 247192 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 222121112211 its reverse (112211121222), we get a palindrome (334332233433).

The spelling of 222121112211 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred eleven".