220001011 has 4 divisors (see below), whose sum is σ = 220222672. Its totient is φ = 219779352.

The previous prime is 220000997. The next prime is 220001027. The reversal of 220001011 is 110100022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220001011 - 2²¹ = 217903859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220000985 and 220001003.

It is not an unprimeable number, because it can be changed into a prime (220001051) 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 in 3 ways as a sum of consecutive naturals, for example, 109335 + ... + 111328.

It is an arithmetic number, because the mean of its divisors is an integer number (55055668).

Almost surely, 2^220001011 is an apocalyptic number.

220001011 is a deficient number, since it is larger than the sum of its proper divisors (221661).

220001011 is an equidigital number, since it uses as much as digits as its factorization.

220001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221660.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 220001011 is about 14832.4310549552. The cubic root of 220001011 is about 603.6819984080.

Adding to 220001011 its reverse (110100022), we get a palindrome (330101033).

The spelling of 220001011 in words is "two hundred twenty million, one thousand, eleven".