11984346421 has 2 divisors, whose sum is σ = 11984346422. Its totient is φ = 11984346420.

The previous prime is 11984346293. The next prime is 11984346427. The reversal of 11984346421 is 12464348911.

11984346421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7154791396 + 4829555025 = 84586^2 + 69495^2 .

It is a cyclic number.

It is not a de Polignac number, because 11984346421 - 2⁷ = 11984346293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11984346427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5992173210 + 5992173211.

It is an arithmetic number, because the mean of its divisors is an integer number (5992173211).

Almost surely, 2^11984346421 is an apocalyptic number.

It is an amenable number.

11984346421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11984346421 is an equidigital number, since it uses as much as digits as its factorization.

11984346421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The spelling of 11984346421 in words is "eleven billion, nine hundred eighty-four million, three hundred forty-six thousand, four hundred twenty-one".