1220120112222 has 80 divisors (see below), whose sum is σ = 3085361334000. Its totient is φ = 356983925760.

The previous prime is 1220120112187. The next prime is 1220120112241. The reversal of 1220120112222 is 2222110210221.

It is a happy number.

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 = 1220120112195 and 1220120112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11753347 + ... + 11856702.

It is an arithmetic number, because the mean of its divisors is an integer number (38567016675).

Almost surely, 2^{1220120112222} is an apocalyptic number.

1220120112222 is an abundant number, since it is smaller than the sum of its proper divisors (1865241221778).

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

1220120112222 is a wasteful number, since it uses less digits than its factorization.

1220120112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23610103 (or 23610094 counting only the distinct ones).

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

Adding to 1220120112222 its reverse (2222110210221), we get a palindrome (3442230322443).

The spelling of 1220120112222 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one hundred twelve thousand, two hundred twenty-two".