11721430271 has 2 divisors, whose sum is σ = 11721430272. Its totient is φ = 11721430270.

The previous prime is 11721430247. The next prime is 11721430289. The reversal of 11721430271 is 17203412711.

It is a strong prime.

It is an emirp because it is prime and its reverse (17203412711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11721430271 - 2²² = 11717235967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11721430211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860715135 + 5860715136.

It is an arithmetic number, because the mean of its divisors is an integer number (5860715136).

Almost surely, 2^11721430271 is an apocalyptic number.

11721430271 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721430271 is an equidigital number, since it uses as much as digits as its factorization.

11721430271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

Adding to 11721430271 its reverse (17203412711), we get a palindrome (28924842982).

The spelling of 11721430271 in words is "eleven billion, seven hundred twenty-one million, four hundred thirty thousand, two hundred seventy-one".