1222222222200 has 96 divisors (see below), whose sum is σ = 4330158744960. Its totient is φ = 279365078400.

The previous prime is 1222222222189. The next prime is 1222222222211. The reversal of 1222222222200 is 22222222221.

It is an interprime number because it is at equal distance from previous prime (1222222222189) and next prime (1222222222211).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145498446 + ... + 145506845.

It is an arithmetic number, because the mean of its divisors is an integer number (45105820260).

Almost surely, 2^{1222222222200} is an apocalyptic number.

1222222222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222222222200 is an abundant number, since it is smaller than the sum of its proper divisors (3107936522760).

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

1222222222200 is a wasteful number, since it uses less digits than its factorization.

1222222222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291005317 (or 291005308 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 1222222222200 its sum of digits (21), we get a palindrome (1222222222221).

Adding to 1222222222200 its reverse (22222222221), we get a palindrome (1244444444421).

The spelling of 1222222222200 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred".