1001120221201 has 4 divisors (see below), whose sum is σ = 1001878072804. Its totient is φ = 1000362369600.

The previous prime is 1001120221169. The next prime is 1001120221223. The reversal of 1001120221201 is 1021220211001.

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 785972675601 + 215147545600 = 886551^2 + 463840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001120221201 - 2⁵ = 1001120221169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001120221261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378923820 + ... + 378926461.

It is an arithmetic number, because the mean of its divisors is an integer number (250469518201).

Almost surely, 2^{1001120221201} is an apocalyptic number.

It is an amenable number.

1001120221201 is a deficient number, since it is larger than the sum of its proper divisors (757851603).

1001120221201 is an equidigital number, since it uses as much as digits as its factorization.

1001120221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757851602.

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

Adding to 1001120221201 its reverse (1021220211001), we get a palindrome (2022340432202).

The spelling of 1001120221201 in words is "one trillion, one billion, one hundred twenty million, two hundred twenty-one thousand, two hundred one".