1200220112100 has 36 divisors (see below), whose sum is σ = 3472636858544. Its totient is φ = 320058696480.

The previous prime is 1200220112053. The next prime is 1200220112107. The reversal of 1200220112100 is 12110220021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1200220112107) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2000366554 + ... + 2000367153.

Almost surely, 2^{1200220112100} is an apocalyptic number.

1200220112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200220112100 is an abundant number, since it is smaller than the sum of its proper divisors (2272416746444).

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

1200220112100 is a wasteful number, since it uses less digits than its factorization.

1200220112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000733724 (or 4000733717 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200220112100 its reverse (12110220021), we get a palindrome (1212330332121).

The spelling of 1200220112100 in words is "one trillion, two hundred billion, two hundred twenty million, one hundred twelve thousand, one hundred".