1200022002221 has 16 divisors (see below), whose sum is σ = 1376607197184. Its totient is φ = 1024730555904.

The previous prime is 1200022002167. The next prime is 1200022002229. The reversal of 1200022002221 is 1222002200021.

It is a cyclic number.

It is not a de Polignac number, because 1200022002221 - 2³⁰ = 1198948260397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200022002196 and 1200022002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200022002229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2462591 + ... + 2909363.

It is an arithmetic number, because the mean of its divisors is an integer number (86037949824).

Almost surely, 2^{1200022002221} is an apocalyptic number.

It is an amenable number.

1200022002221 is a deficient number, since it is larger than the sum of its proper divisors (176585194963).

1200022002221 is a wasteful number, since it uses less digits than its factorization.

1200022002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448220.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1200022002221 its reverse (1222002200021), we get a palindrome (2422024202242).

The spelling of 1200022002221 in words is "one trillion, two hundred billion, twenty-two million, two thousand, two hundred twenty-one".