20001000222211 has 4 divisors (see below), whose sum is σ = 20112737653800. Its totient is φ = 19889262790624.

The previous prime is 20001000222209. The next prime is 20001000222221. The reversal of 20001000222211 is 11222200010002.

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 20001000222211 - 2¹ = 20001000222209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001000222191 and 20001000222200.

It is not an unprimeable number, because it can be changed into a prime (20001000222221) 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, 55868715526 + ... + 55868715883.

It is an arithmetic number, because the mean of its divisors is an integer number (5028184413450).

Almost surely, 2^{20001000222211} is an apocalyptic number.

20001000222211 is a deficient number, since it is larger than the sum of its proper divisors (111737431589).

20001000222211 is a wasteful number, since it uses less digits than its factorization.

20001000222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111737431588.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20001000222211 its reverse (11222200010002), we get a palindrome (31223200232213).

The spelling of 20001000222211 in words is "twenty trillion, one billion, two hundred twenty-two thousand, two hundred eleven".