21000022200011 has 4 divisors (see below), whose sum is σ = 21003738366024. Its totient is φ = 20996306034000.

The previous prime is 21000022200007. The next prime is 21000022200067. The reversal of 21000022200011 is 11000222000012.

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 21000022200011 - 2² = 21000022200007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000022199965 and 21000022200001.

It is not an unprimeable number, because it can be changed into a prime (21000022200071) 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, 1858074530 + ... + 1858085831.

It is an arithmetic number, because the mean of its divisors is an integer number (5250934591506).

Almost surely, 2^{21000022200011} is an apocalyptic number.

21000022200011 is a deficient number, since it is larger than the sum of its proper divisors (3716166013).

21000022200011 is an equidigital number, since it uses as much as digits as its factorization.

21000022200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716166012.

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

Adding to 21000022200011 its reverse (11000222000012), we get a palindrome (32000244200023).

The spelling of 21000022200011 in words is "twenty-one trillion, twenty-two million, two hundred thousand, eleven".