1201000002221 has 4 divisors (see below), whose sum is σ = 1230292685244. Its totient is φ = 1171707319200.

The previous prime is 1201000002197. The next prime is 1201000002229. The reversal of 1201000002221 is 1222000001021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60245702500 + 1140754299721 = 245450^2 + 1068061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201000002221 - 2¹⁰ = 1201000001197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201000002229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14646341450 + ... + 14646341531.

It is an arithmetic number, because the mean of its divisors is an integer number (307573171311).

Almost surely, 2^{1201000002221} is an apocalyptic number.

It is an amenable number.

1201000002221 is a deficient number, since it is larger than the sum of its proper divisors (29292683023).

1201000002221 is an equidigital number, since it uses as much as digits as its factorization.

1201000002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29292683022.

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

Adding to 1201000002221 its reverse (1222000001021), we get a palindrome (2423000003242).

The spelling of 1201000002221 in words is "one trillion, two hundred one billion, two thousand, two hundred twenty-one".