1222021121200 has 120 divisors (see below), whose sum is σ = 3280923976176. Its totient is φ = 433532928000.

The previous prime is 1222021121197. The next prime is 1222021121213. The reversal of 1222021121200 is 21211202221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3206577 + ... + 3567376.

Almost surely, 2^{1222021121200} is an apocalyptic number.

1222021121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222021121200 is an abundant number, since it is smaller than the sum of its proper divisors (2058902854976).

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

1222021121200 is a wasteful number, since it uses less digits than its factorization.

1222021121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774023 (or 6774012 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1222021121200 its reverse (21211202221), we get a palindrome (1243232323421).

The spelling of 1222021121200 in words is "one trillion, two hundred twenty-two billion, twenty-one million, one hundred twenty-one thousand, two hundred".