21200000211 has 32 divisors (see below), whose sum is σ = 33872005440. Its totient is φ = 13027392000.

The previous prime is 21200000141. The next prime is 21200000219. The reversal of 21200000211 is 11200000212.

It is not a de Polignac number, because 21200000211 - 2⁷ = 21200000083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21200000193 and 21200000202.

It is not an unprimeable number, because it can be changed into a prime (21200000219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202971 + ... + 289131.

It is an arithmetic number, because the mean of its divisors is an integer number (1058500170).

Almost surely, 2^21200000211 is an apocalyptic number.

21200000211 is a deficient number, since it is larger than the sum of its proper divisors (12672005229).

21200000211 is a wasteful number, since it uses less digits than its factorization.

21200000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86884 (or 86878 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21200000211 its reverse (11200000212), we get a palindrome (32400000423).

Subtracting from 21200000211 its reverse (11200000212), we obtain a palindrome (9999999999).

The spelling of 21200000211 in words is "twenty-one billion, two hundred million, two hundred eleven", and thus it is an aban number.