1221022200112 has 80 divisors (see below), whose sum is σ = 2900159877888. Its totient is φ = 490042333440.

The previous prime is 1221022200103. The next prime is 1221022200149. The reversal of 1221022200112 is 2110022201221.

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 15 ways as a sum of consecutive naturals, for example, 11548758 + ... + 11654005.

Almost surely, 2^{1221022200112} is an apocalyptic number.

It is an amenable number.

1221022200112 is an abundant number, since it is smaller than the sum of its proper divisors (1679137677776).

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

1221022200112 is a wasteful number, since it uses less digits than its factorization.

1221022200112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23202818 (or 23202812 counting only the distinct ones).

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

Adding to 1221022200112 its reverse (2110022201221), we get a palindrome (3331044401333).

The spelling of 1221022200112 in words is "one trillion, two hundred twenty-one billion, twenty-two million, two hundred thousand, one hundred twelve".