220012081 has 2 divisors, whose sum is σ = 220012082. Its totient is φ = 220012080.

The previous prime is 220012069. The next prime is 220012097. The reversal of 220012081 is 180210022.

220012081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (220012097) can be obtained adding 220012081 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219306481 + 705600 = 14809^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 220012081 - 2⁵ = 220012049 is a prime.

It is a super-2 number, since 2×220012081² = 96810631571901122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221012081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110006040 + 110006041.

It is an arithmetic number, because the mean of its divisors is an integer number (110006041).

Almost surely, 2^220012081 is an apocalyptic number.

It is an amenable number.

220012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

220012081 is an equidigital number, since it uses as much as digits as its factorization.

220012081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 220012081 is about 14832.8042190275. The cubic root of 220012081 is about 603.6921235852.

The spelling of 220012081 in words is "two hundred twenty million, twelve thousand, eighty-one".