222111222012 has 60 divisors (see below), whose sum is σ = 587166758640. Its totient is φ = 73205187264.

The previous prime is 222111221929. The next prime is 222111222013. The reversal of 222111222012 is 210222111222.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111222013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3822448 + ... + 3880119.

It is an arithmetic number, because the mean of its divisors is an integer number (9786112644).

Almost surely, 2^222111222012 is an apocalyptic number.

It is an amenable number.

222111222012 is an abundant number, since it is smaller than the sum of its proper divisors (365055536628).

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

222111222012 is a wasteful number, since it uses less digits than its factorization.

222111222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7702672 (or 7702661 counting only the distinct ones).

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

Adding to 222111222012 its reverse (210222111222), we get a palindrome (432333333234).

The spelling of 222111222012 in words is "two hundred twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, twelve".