11403065621 has 2 divisors, whose sum is σ = 11403065622. Its totient is φ = 11403065620.

The previous prime is 11403065581. The next prime is 11403065623. The reversal of 11403065621 is 12656030411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10910847025 + 492218596 = 104455^2 + 22186^2 .

It is an emirp because it is prime and its reverse (12656030411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11403065621 is a prime.

Together with 11403065623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11403065623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5701532810 + 5701532811.

It is an arithmetic number, because the mean of its divisors is an integer number (5701532811).

Almost surely, 2^11403065621 is an apocalyptic number.

It is an amenable number.

11403065621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11403065621 is an equidigital number, since it uses as much as digits as its factorization.

11403065621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 11403065621 in words is "eleven billion, four hundred three million, sixty-five thousand, six hundred twenty-one".