1012001201221 has 6 divisors (see below), whose sum is σ = 1057914299750. Its totient is φ = 968001148488.

The previous prime is 1012001201203. The next prime is 1012001201227. The reversal of 1012001201221 is 1221021002101.

It can be written as a sum of positive squares in only one way, i.e., 1011058404196 + 942797025 = 1005514^2 + 30705^2 .

It is not a de Polignac number, because 1012001201221 - 2⁷ = 1012001201093 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 (1012001201227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 956522346 + ... + 956523403.

Almost surely, 2^{1012001201221} is an apocalyptic number.

It is an amenable number.

1012001201221 is a deficient number, since it is larger than the sum of its proper divisors (45913098529).

1012001201221 is an equidigital number, since it uses as much as digits as its factorization.

1012001201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913045795 (or 1913045772 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1012001201221 its reverse (1221021002101), we get a palindrome (2233022203322).

The spelling of 1012001201221 in words is "one trillion, twelve billion, one million, two hundred one thousand, two hundred twenty-one".