11821489441 has 2 divisors, whose sum is σ = 11821489442. Its totient is φ = 11821489440.

The previous prime is 11821489429. The next prime is 11821489487. The reversal of 11821489441 is 14498412811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7939701025 + 3881788416 = 89105^2 + 62304^2 .

It is a cyclic number.

It is not a de Polignac number, because 11821489441 - 2⁵ = 11821489409 is a prime.

It is a super-2 number, since 2×11821489441² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11821489241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910744720 + 5910744721.

It is an arithmetic number, because the mean of its divisors is an integer number (5910744721).

Almost surely, 2^11821489441 is an apocalyptic number.

It is an amenable number.

11821489441 is a deficient number, since it is larger than the sum of its proper divisors (1).

11821489441 is an equidigital number, since it uses as much as digits as its factorization.

11821489441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 43.

The spelling of 11821489441 in words is "eleven billion, eight hundred twenty-one million, four hundred eighty-nine thousand, four hundred forty-one".