222222001212 has 144 divisors (see below), whose sum is σ = 600335124480. Its totient is φ = 69155856000.

The previous prime is 222222001207. The next prime is 222222001237. The reversal of 222222001212 is 212100222222.

It is a super-2 number, since 2×222222001212² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57703087 + ... + 57706937.

It is an arithmetic number, because the mean of its divisors is an integer number (4168993920).

Almost surely, 2^222222001212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222222001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300167562240).

222222001212 is an abundant number, since it is smaller than the sum of its proper divisors (378113123268).

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

222222001212 is a wasteful number, since it uses less digits than its factorization.

222222001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5704 (or 5699 counting only the distinct ones).

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

Adding to 222222001212 its reverse (212100222222), we get a palindrome (434322223434).

The spelling of 222222001212 in words is "two hundred twenty-two billion, two hundred twenty-two million, one thousand, two hundred twelve".