222212011212 has 18 divisors (see below), whose sum is σ = 561702583988. Its totient is φ = 74070670392.

The previous prime is 222212011211. The next prime is 222212011237. The reversal of 222212011212 is 212110212222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (222212011211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3086277898 + ... + 3086277969.

Almost surely, 2^222212011212 is an apocalyptic number.

It is an amenable number.

222212011212 is an abundant number, since it is smaller than the sum of its proper divisors (339490572776).

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

222212011212 is a wasteful number, since it uses less digits than its factorization.

222212011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172555877 (or 6172555872 counting only the distinct ones).

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

Adding to 222212011212 its reverse (212110212222), we get a palindrome (434322223434).

The spelling of 222212011212 in words is "two hundred twenty-two billion, two hundred twelve million, eleven thousand, two hundred twelve".