21100323611 has 2 divisors, whose sum is σ = 21100323612. Its totient is φ = 21100323610.

The previous prime is 21100323529. The next prime is 21100323613. The reversal of 21100323611 is 11632300112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100323611 - 2³⁰ = 20026581787 is a prime.

Together with 21100323613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21100323613) 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, 10550161805 + 10550161806.

It is an arithmetic number, because the mean of its divisors is an integer number (10550161806).

Almost surely, 2^21100323611 is an apocalyptic number.

21100323611 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100323611 is an equidigital number, since it uses as much as digits as its factorization.

21100323611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21100323611 its reverse (11632300112), we get a palindrome (32732623723).

The spelling of 21100323611 in words is "twenty-one billion, one hundred million, three hundred twenty-three thousand, six hundred eleven".