21001210327 has 2 divisors, whose sum is σ = 21001210328. Its totient is φ = 21001210326.

The previous prime is 21001210309. The next prime is 21001210337. The reversal of 21001210327 is 72301210012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21001210327 - 2¹¹ = 21001208279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001210337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500605163 + 10500605164.

It is an arithmetic number, because the mean of its divisors is an integer number (10500605164).

Almost surely, 2^21001210327 is an apocalyptic number.

21001210327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001210327 is an equidigital number, since it uses as much as digits as its factorization.

21001210327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 21001210327 its reverse (72301210012), we get a palindrome (93302420339).

The spelling of 21001210327 in words is "twenty-one billion, one million, two hundred ten thousand, three hundred twenty-seven".