2222220001 has 4 divisors (see below), whose sum is σ = 2223171604. Its totient is φ = 2221268400.

The previous prime is 2222219999. The next prime is 2222220047. The reversal of 2222220001 is 1000222222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1440961600 + 781258401 = 37960^2 + 27951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222220001 - 2¹ = 2222219999 is a prime.

It is a super-5 number, since 5×2222220001⁵ (a number of 48 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222220061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472290 + ... + 476971.

It is an arithmetic number, because the mean of its divisors is an integer number (555792901).

Almost surely, 2^2222220001 is an apocalyptic number.

It is an amenable number.

2222220001 is a deficient number, since it is larger than the sum of its proper divisors (951603).

2222220001 is an equidigital number, since it uses as much as digits as its factorization.

2222220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951602.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2222220001 is about 47140.4285194778. The cubic root of 2222220001 is about 1304.9554455999.

Adding to 2222220001 its reverse (1000222222), we get a palindrome (3222442223).

The spelling of 2222220001 in words is "two billion, two hundred twenty-two million, two hundred twenty thousand, one".