21210002311 has 2 divisors, whose sum is σ = 21210002312. Its totient is φ = 21210002310.

The previous prime is 21210002279. The next prime is 21210002327. The reversal of 21210002311 is 11320001212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21210002311 - 2⁵ = 21210002279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210002291 and 21210002300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210042311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605001155 + 10605001156.

It is an arithmetic number, because the mean of its divisors is an integer number (10605001156).

Almost surely, 2^21210002311 is an apocalyptic number.

21210002311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210002311 is an equidigital number, since it uses as much as digits as its factorization.

21210002311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21210002311 its reverse (11320001212), we get a palindrome (32530003523).

The spelling of 21210002311 in words is "twenty-one billion, two hundred ten million, two thousand, three hundred eleven".