11321550401 has 24 divisors (see below), whose sum is σ = 13952241576. Its totient is φ = 9128394240.

The previous prime is 11321550379. The next prime is 11321550433. The reversal of 11321550401 is 10405512311.

It can be written as a sum of positive squares in 4 ways, for example, as 3161138176 + 8160412225 = 56224^2 + 90335^2 .

It is not a de Polignac number, because 11321550401 - 2²² = 11317356097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11321550701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2961071 + ... + 2964891.

It is an arithmetic number, because the mean of its divisors is an integer number (581343399).

Almost surely, 2^11321550401 is an apocalyptic number.

It is an amenable number.

11321550401 is a deficient number, since it is larger than the sum of its proper divisors (2630691175).

11321550401 is a wasteful number, since it uses less digits than its factorization.

11321550401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7409 (or 7402 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 11321550401 in words is "eleven billion, three hundred twenty-one million, five hundred fifty thousand, four hundred one".