21303001211 has 2 divisors, whose sum is σ = 21303001212. Its totient is φ = 21303001210.

The previous prime is 21303001199. The next prime is 21303001249. The reversal of 21303001211 is 11210030312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303001211 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651500605 + 10651500606.

It is an arithmetic number, because the mean of its divisors is an integer number (10651500606).

Almost surely, 2^21303001211 is an apocalyptic number.

21303001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303001211 is an equidigital number, since it uses as much as digits as its factorization.

21303001211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21303001211 its reverse (11210030312), we get a palindrome (32513031523).

The spelling of 21303001211 in words is "twenty-one billion, three hundred three million, one thousand, two hundred eleven".