21012200327 has 2 divisors, whose sum is σ = 21012200328. Its totient is φ = 21012200326.

The previous prime is 21012200323. The next prime is 21012200333. The reversal of 21012200327 is 72300221012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012200327 - 2² = 21012200323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21012200299 and 21012200308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012200323) 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, 10506100163 + 10506100164.

It is an arithmetic number, because the mean of its divisors is an integer number (10506100164).

Almost surely, 2^21012200327 is an apocalyptic number.

21012200327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012200327 is an equidigital number, since it uses as much as digits as its factorization.

21012200327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 21012200327 its reverse (72300221012), we get a palindrome (93312421339).

The spelling of 21012200327 in words is "twenty-one billion, twelve million, two hundred thousand, three hundred twenty-seven".