21200304121211 has 2 divisors, whose sum is σ = 21200304121212. Its totient is φ = 21200304121210.

The previous prime is 21200304121177. The next prime is 21200304121229. The reversal of 21200304121211 is 11212140300212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200304121211 - 2¹⁴ = 21200304104827 is a prime.

It is a super-2 number, since 2×21200304121211² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21200304121411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600152060605 + 10600152060606.

It is an arithmetic number, because the mean of its divisors is an integer number (10600152060606).

Almost surely, 2^{21200304121211} is an apocalyptic number.

21200304121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200304121211 is an equidigital number, since it uses as much as digits as its factorization.

21200304121211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21200304121211 its reverse (11212140300212), we get a palindrome (32412444421423).

The spelling of 21200304121211 in words is "twenty-one trillion, two hundred billion, three hundred four million, one hundred twenty-one thousand, two hundred eleven".