21201301327 has 2 divisors, whose sum is σ = 21201301328. Its totient is φ = 21201301326.

The previous prime is 21201301313. The next prime is 21201301367. The reversal of 21201301327 is 72310310212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201301327 - 2²⁷ = 21067083599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201301298 and 21201301307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201301367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600650663 + 10600650664.

It is an arithmetic number, because the mean of its divisors is an integer number (10600650664).

Almost surely, 2^21201301327 is an apocalyptic number.

21201301327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201301327 is an equidigital number, since it uses as much as digits as its factorization.

21201301327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 21201301327 its reverse (72310310212), we get a palindrome (93511611539).

The spelling of 21201301327 in words is "twenty-one billion, two hundred one million, three hundred one thousand, three hundred twenty-seven".