2002122281 has 4 divisors (see below), whose sum is σ = 2056233732. Its totient is φ = 1948010832.

The previous prime is 2002122233. The next prime is 2002122307. The reversal of 2002122281 is 1822212002.

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 713958400 + 1288163881 = 26720^2 + 35891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002122281 is a prime.

It is a super-2 number, since 2×2002122281² = 8016987256153285922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002122211) 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, 27055670 + ... + 27055743.

It is an arithmetic number, because the mean of its divisors is an integer number (514058433).

Almost surely, 2^2002122281 is an apocalyptic number.

It is an amenable number.

2002122281 is a deficient number, since it is larger than the sum of its proper divisors (54111451).

2002122281 is an equidigital number, since it uses as much as digits as its factorization.

2002122281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54111450.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 2002122281 is about 44745.0810816116. The cubic root of 2002122281 is about 1260.3665434392.

Adding to 2002122281 its reverse (1822212002), we get a palindrome (3824334283).

The spelling of 2002122281 in words is "two billion, two million, one hundred twenty-two thousand, two hundred eighty-one".