1200002102221 has 32 divisors (see below), whose sum is σ = 1316927437056. Its totient is φ = 1086808320000.

The previous prime is 1200002102209. The next prime is 1200002102263. The reversal of 1200002102221 is 1222012000021.

It is a happy number.

It is not a de Polignac number, because 1200002102221 - 2³³ = 1191412167629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200002105221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195087496 + ... + 195093646.

It is an arithmetic number, because the mean of its divisors is an integer number (41153982408).

Almost surely, 2^{1200002102221} is an apocalyptic number.

It is an amenable number.

1200002102221 is a deficient number, since it is larger than the sum of its proper divisors (116925334835).

1200002102221 is a wasteful number, since it uses less digits than its factorization.

1200002102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7573.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200002102221 its reverse (1222012000021), we get a palindrome (2422014102242).

The spelling of 1200002102221 in words is "one trillion, two hundred billion, two million, one hundred two thousand, two hundred twenty-one".