1200002013221 has 4 divisors (see below), whose sum is σ = 1309093105344. Its totient is φ = 1090910921100.

The previous prime is 1200002013157. The next prime is 1200002013277. The reversal of 1200002013221 is 1223102000021.

It is a happy number.

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 1200002013221 - 2⁶ = 1200002013157 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 = 1200002013196 and 1200002013205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200002033221) 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, 54545546045 + ... + 54545546066.

It is an arithmetic number, because the mean of its divisors is an integer number (327273276336).

Almost surely, 2^{1200002013221} is an apocalyptic number.

1200002013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200002013221 is a deficient number, since it is larger than the sum of its proper divisors (109091092123).

1200002013221 is a wasteful number, since it uses less digits than its factorization.

1200002013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109091092122.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1200002013221 its reverse (1223102000021), we get a palindrome (2423104013242).

The spelling of 1200002013221 in words is "one trillion, two hundred billion, two million, thirteen thousand, two hundred twenty-one".