222222101211212 has 24 divisors (see below), whose sum is σ = 427154611027200. Its totient is φ = 100686444026256.

The previous prime is 222222101211181. The next prime is 222222101211217. The reversal of 222222101211212 is 212112101222222.

It is a super-2 number, since 2×222222101211212² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (222222101211217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63564672512 + ... + 63564676007.

It is an arithmetic number, because the mean of its divisors is an integer number (17798108792800).

Almost surely, 2^{222222101211212} is an apocalyptic number.

It is an amenable number.

222222101211212 is a deficient number, since it is larger than the sum of its proper divisors (204932509815988).

222222101211212 is a wasteful number, since it uses less digits than its factorization.

222222101211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127129348565 (or 127129348563 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222222101211212 its reverse (212112101222222), we get a palindrome (434334202433434).

The spelling of 222222101211212 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred one million, two hundred eleven thousand, two hundred twelve".