2002281121 has 4 divisors (see below), whose sum is σ = 2002370692. Its totient is φ = 2002191552.

The previous prime is 2002281109. The next prime is 2002281137. The reversal of 2002281121 is 1211822002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 151560721 + 1850720400 = 12311^2 + 43020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002281121 - 2²³ = 1993892513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002281101) 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, 19621 + ... + 66253.

It is an arithmetic number, because the mean of its divisors is an integer number (500592673).

Almost surely, 2^2002281121 is an apocalyptic number.

It is an amenable number.

2002281121 is a deficient number, since it is larger than the sum of its proper divisors (89571).

2002281121 is an equidigital number, since it uses as much as digits as its factorization.

2002281121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89570.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 2002281121 is about 44746.8559901140. The cubic root of 2002281121 is about 1260.3998732928.

The spelling of 2002281121 in words is "two billion, two million, two hundred eighty-one thousand, one hundred twenty-one".