21102200212811 has 2 divisors, whose sum is σ = 21102200212812. Its totient is φ = 21102200212810.

The previous prime is 21102200212789. The next prime is 21102200212831. The reversal of 21102200212811 is 11821200220112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102200212811 is a prime.

It is a super-2 number, since 2×21102200212811² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21102200212831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551100106405 + 10551100106406.

It is an arithmetic number, because the mean of its divisors is an integer number (10551100106406).

Almost surely, 2^{21102200212811} is an apocalyptic number.

21102200212811 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102200212811 is an equidigital number, since it uses as much as digits as its factorization.

21102200212811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

Adding to 21102200212811 its reverse (11821200220112), we get a palindrome (32923400432923).

The spelling of 21102200212811 in words is "twenty-one trillion, one hundred two billion, two hundred million, two hundred twelve thousand, eight hundred eleven".