21200022211 has 2 divisors, whose sum is σ = 21200022212. Its totient is φ = 21200022210.

The previous prime is 21200022197. The next prime is 21200022251. The reversal of 21200022211 is 11222000212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200022211 - 2⁷ = 21200022083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21200022191 and 21200022200.

It is not a weakly prime, because it can be changed into another prime (21200022251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600011105 + 10600011106.

It is an arithmetic number, because the mean of its divisors is an integer number (10600011106).

Almost surely, 2^21200022211 is an apocalyptic number.

21200022211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200022211 is an equidigital number, since it uses as much as digits as its factorization.

21200022211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21200022211 its reverse (11222000212), we get a palindrome (32422022423).

The spelling of 21200022211 in words is "twenty-one billion, two hundred million, twenty-two thousand, two hundred eleven".