20220220091 has 2 divisors, whose sum is σ = 20220220092. Its totient is φ = 20220220090.

The previous prime is 20220220081. The next prime is 20220220117. The reversal of 20220220091 is 19002202202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220220091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20220220081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110110045 + 10110110046.

It is an arithmetic number, because the mean of its divisors is an integer number (10110110046).

Almost surely, 2^20220220091 is an apocalyptic number.

20220220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220220091 is an equidigital number, since it uses as much as digits as its factorization.

20220220091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20220220091 its reverse (19002202202), we get a palindrome (39222422293).

The spelling of 20220220091 in words is "twenty billion, two hundred twenty million, two hundred twenty thousand, ninety-one".