1222211100222 has 96 divisors (see below), whose sum is σ = 3159834170400. Its totient is φ = 349161515136.

The previous prime is 1222211100197. The next prime is 1222211100239. The reversal of 1222211100222 is 2220011122221.

It is a happy number.

1222211100222 is a `hidden beast` number, since 1 + 222 + 211 + 10 + 0 + 222 = 666.

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 = 1222211100195 and 1222211100204.

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, 27265804 + ... + 27310592.

It is an arithmetic number, because the mean of its divisors is an integer number (32914939275).

Almost surely, 2^{1222211100222} is an apocalyptic number.

1222211100222 is an abundant number, since it is smaller than the sum of its proper divisors (1937623070178).

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

1222211100222 is a wasteful number, since it uses less digits than its factorization.

1222211100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55127 (or 55114 counting only the distinct ones).

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

Adding to 1222211100222 its reverse (2220011122221), we get a palindrome (3442222222443).

The spelling of 1222211100222 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred thousand, two hundred twenty-two".