220020091 has 2 divisors, whose sum is σ = 220020092. Its totient is φ = 220020090.

The previous prime is 220020089. The next prime is 220020149. The reversal of 220020091 is 190020022.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220020091 - 2¹ = 220020089 is a prime.

Together with 220020089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (220020011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010045 + 110010046.

It is an arithmetic number, because the mean of its divisors is an integer number (110010046).

Almost surely, 2^220020091 is an apocalyptic number.

220020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

220020091 is an equidigital number, since it uses as much as digits as its factorization.

220020091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 220020091 is about 14833.0742262014. The cubic root of 220020091 is about 603.6994497211.

The spelling of 220020091 in words is "two hundred twenty million, twenty thousand, ninety-one".