220011901 has 2 divisors, whose sum is σ = 220011902. Its totient is φ = 220011900.

The previous prime is 220011877. The next prime is 220011923. The reversal of 220011901 is 109110022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189475225 + 30536676 = 13765^2 + 5526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220011901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220011931) 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, 110005950 + 110005951.

It is an arithmetic number, because the mean of its divisors is an integer number (110005951).

Almost surely, 2^220011901 is an apocalyptic number.

It is an amenable number.

220011901 is a deficient number, since it is larger than the sum of its proper divisors (1).

220011901 is an equidigital number, since it uses as much as digits as its factorization.

220011901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 220011901 is about 14832.7981513941. The cubic root of 220011901 is about 603.6919589509.

Adding to 220011901 its reverse (109110022), we get a palindrome (329121923).

The spelling of 220011901 in words is "two hundred twenty million, eleven thousand, nine hundred one".