2221001220211 has 4 divisors (see below), whose sum is σ = 2221020162000. Its totient is φ = 2220982278424.

The previous prime is 2221001220187. The next prime is 2221001220239. The reversal of 2221001220211 is 1120221001222.

It is a happy number.

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 2221001220211 - 2¹⁹ = 2221000695923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221001220241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9293911 + ... + 9529888.

It is an arithmetic number, because the mean of its divisors is an integer number (555255040500).

Almost surely, 2^{2221001220211} is an apocalyptic number.

2221001220211 is a deficient number, since it is larger than the sum of its proper divisors (18941789).

2221001220211 is a wasteful number, since it uses less digits than its factorization.

2221001220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18941788.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2221001220211 its reverse (1120221001222), we get a palindrome (3341222221433).

The spelling of 2221001220211 in words is "two trillion, two hundred twenty-one billion, one million, two hundred twenty thousand, two hundred eleven".