11802317521 has 4 divisors (see below), whose sum is σ = 11916903232. Its totient is φ = 11687731812.

The previous prime is 11802317503. The next prime is 11802317539. The reversal of 11802317521 is 12571320811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (11802317503) and next prime (11802317539).

It is a cyclic number.

It is not a de Polignac number, because 11802317521 - 2¹³ = 11802309329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11802317321) 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 in 3 ways as a sum of consecutive naturals, for example, 57292701 + ... + 57292906.

It is an arithmetic number, because the mean of its divisors is an integer number (2979225808).

Almost surely, 2^11802317521 is an apocalyptic number.

It is an amenable number.

11802317521 is a deficient number, since it is larger than the sum of its proper divisors (114585711).

11802317521 is a wasteful number, since it uses less digits than its factorization.

11802317521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114585710.

The product of its (nonzero) digits is 3360, while the sum is 31.

The spelling of 11802317521 in words is "eleven billion, eight hundred two million, three hundred seventeen thousand, five hundred twenty-one".