1201220112222 has 64 divisors (see below), whose sum is σ = 2875147349760. Its totient is φ = 369550575072.

The previous prime is 1201220112167. The next prime is 1201220112247. The reversal of 1201220112222 is 2222110221021.

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 = 1201220112195 and 1201220112204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4667233 + ... + 4917875.

It is an arithmetic number, because the mean of its divisors is an integer number (44924177340).

Almost surely, 2^{1201220112222} is an apocalyptic number.

1201220112222 is an abundant number, since it is smaller than the sum of its proper divisors (1673927237538).

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

1201220112222 is a wasteful number, since it uses less digits than its factorization.

1201220112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257494 (or 257488 counting only the distinct ones).

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

Adding to 1201220112222 its reverse (2222110221021), we get a palindrome (3423330333243).

The spelling of 1201220112222 in words is "one trillion, two hundred one billion, two hundred twenty million, one hundred twelve thousand, two hundred twenty-two".