1000022081 has 2 divisors, whose sum is σ = 1000022082. Its totient is φ = 1000022080.

The previous prime is 1000022071. The next prime is 1000022173. The reversal of 1000022081 is 1802200001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 560742400 + 439279681 = 23680^2 + 20959^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000022081 - 2²⁶ = 932913217 is a prime.

It is a super-3 number, since 3×1000022081³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1000022071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500011040 + 500011041.

It is an arithmetic number, because the mean of its divisors is an integer number (500011041).

Almost surely, 2^1000022081 is an apocalyptic number.

It is an amenable number.

1000022081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000022081 is an equidigital number, since it uses as much as digits as its factorization.

1000022081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1000022081 is about 31623.1257310216. The cubic root of 1000022081 is about 1000.0073602792.

Adding to 1000022081 its reverse (1802200001), we get a palindrome (2802222082).

The spelling of 1000022081 in words is "one billion, twenty-two thousand, eighty-one".