1200020221100 has 18 divisors (see below), whose sum is σ = 2604043880004. Its totient is φ = 480008088400.

The previous prime is 1200020221091. The next prime is 1200020221111. The reversal of 1200020221100 is 11220200021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6000101006 + ... + 6000101205.

Almost surely, 2^{1200020221100} is an apocalyptic number.

1200020221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200020221100 is an abundant number, since it is smaller than the sum of its proper divisors (1404023658904).

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

1200020221100 is a wasteful number, since it uses less digits than its factorization.

1200020221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12000202225 (or 12000202218 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200020221100 its reverse (11220200021), we get a palindrome (1211240421121).

The spelling of 1200020221100 in words is "one trillion, two hundred billion, twenty million, two hundred twenty-one thousand, one hundred".