2001222011 has 2 divisors, whose sum is σ = 2001222012. Its totient is φ = 2001222010.

The previous prime is 2001222001. The next prime is 2001222023. The reversal of 2001222011 is 1102221002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001222011 - 2¹⁰ = 2001220987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001221983 and 2001222001.

It is not a weakly prime, because it can be changed into another prime (2001222001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000611005 + 1000611006.

It is an arithmetic number, because the mean of its divisors is an integer number (1000611006).

Almost surely, 2^2001222011 is an apocalyptic number.

2001222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001222011 is an equidigital number, since it uses as much as digits as its factorization.

2001222011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2001222011 is about 44735.0199619940. The cubic root of 2001222011 is about 1260.1776038804.

Adding to 2001222011 its reverse (1102221002), we get a palindrome (3103443013).

The spelling of 2001222011 in words is "two billion, one million, two hundred twenty-two thousand, eleven".