11721056443 has 2 divisors, whose sum is σ = 11721056444. Its totient is φ = 11721056442.

The previous prime is 11721056429. The next prime is 11721056467. The reversal of 11721056443 is 34465012711.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11721056443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11721056399 and 11721056408.

It is not a weakly prime, because it can be changed into another prime (11721056483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860528221 + 5860528222.

It is an arithmetic number, because the mean of its divisors is an integer number (5860528222).

Almost surely, 2^11721056443 is an apocalyptic number.

11721056443 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721056443 is an equidigital number, since it uses as much as digits as its factorization.

11721056443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 11721056443 in words is "eleven billion, seven hundred twenty-one million, fifty-six thousand, four hundred forty-three".