20021200211 has 4 divisors (see below), whose sum is σ = 20022752952. Its totient is φ = 20019647472.

The previous prime is 20021200189. The next prime is 20021200223. The reversal of 20021200211 is 11200212002.

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 20021200211 - 2¹⁴ = 20021183827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021200192 and 20021200201.

It is not an unprimeable number, because it can be changed into a prime (20021208211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756866 + ... + 782871.

It is an arithmetic number, because the mean of its divisors is an integer number (5005688238).

Almost surely, 2^20021200211 is an apocalyptic number.

20021200211 is a deficient number, since it is larger than the sum of its proper divisors (1552741).

20021200211 is a wasteful number, since it uses less digits than its factorization.

20021200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552740.

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

Adding to 20021200211 its reverse (11200212002), we get a palindrome (31221412213).

It can be divided in two parts, 200212002 and 11, that multiplied together give a palindrome (2202332022).

The spelling of 20021200211 in words is "twenty billion, twenty-one million, two hundred thousand, two hundred eleven".