21201000011 has 2 divisors, whose sum is σ = 21201000012. Its totient is φ = 21201000010.

The previous prime is 21200999993. The next prime is 21201000017. The reversal of 21201000011 is 11000010212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201000011 - 2⁶ = 21200999947 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201000017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600500005 + 10600500006.

It is an arithmetic number, because the mean of its divisors is an integer number (10600500006).

Almost surely, 2^21201000011 is an apocalyptic number.

21201000011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201000011 is an equidigital number, since it uses as much as digits as its factorization.

21201000011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21201000011 its reverse (11000010212), we get a palindrome (32201010223).

The spelling of 21201000011 in words is "twenty-one billion, two hundred one million, eleven", and thus it is an aban number.