1200100102221 has 4 divisors (see below), whose sum is σ = 1600133469632. Its totient is φ = 800066734812.

The previous prime is 1200100102217. The next prime is 1200100102259. The reversal of 1200100102221 is 1222010010021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1200100102221 - 2² = 1200100102217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200100102197 and 1200100102206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100102261) 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 3 ways as a sum of consecutive naturals, for example, 200016683701 + ... + 200016683706.

It is an arithmetic number, because the mean of its divisors is an integer number (400033367408).

Almost surely, 2^{1200100102221} is an apocalyptic number.

It is an amenable number.

1200100102221 is a deficient number, since it is larger than the sum of its proper divisors (400033367411).

1200100102221 is an equidigital number, since it uses as much as digits as its factorization.

1200100102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400033367410.

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

Adding to 1200100102221 its reverse (1222010010021), we get a palindrome (2422110112242).

The spelling of 1200100102221 in words is "one trillion, two hundred billion, one hundred million, one hundred two thousand, two hundred twenty-one".