12212202222 has 64 divisors (see below), whose sum is σ = 30892561920. Its totient is φ = 3539764800.

The previous prime is 12212202181. The next prime is 12212202239. The reversal of 12212202222 is 22220221221.

12212202222 is a `hidden beast` number, since 1 + 221 + 220 + 2 + 222 = 666.

It is a super-2 number, since 2×12212202222² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12212202195 and 12212202204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 433279 + ... + 460602.

It is an arithmetic number, because the mean of its divisors is an integer number (482696280).

Almost surely, 2^12212202222 is an apocalyptic number.

12212202222 is an abundant number, since it is smaller than the sum of its proper divisors (18680359698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12212202222 is a wasteful number, since it uses less digits than its factorization.

12212202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893926 (or 893920 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12212202222 its reverse (22220221221), we get a palindrome (34432423443).

The spelling of 12212202222 in words is "twelve billion, two hundred twelve million, two hundred two thousand, two hundred twenty-two".