11688701321 has 4 divisors (see below), whose sum is σ = 12751310544. Its totient is φ = 10626092100.

The previous prime is 11688701287. The next prime is 11688701329. The reversal of 11688701321 is 12310788611.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12310788611 = 11 ⋅1119162601.

It is a cyclic number.

It is not a de Polignac number, because 11688701321 - 2²² = 11684507017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11688701329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531304595 + ... + 531304616.

It is an arithmetic number, because the mean of its divisors is an integer number (3187827636).

Almost surely, 2^11688701321 is an apocalyptic number.

11688701321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11688701321 is a deficient number, since it is larger than the sum of its proper divisors (1062609223).

11688701321 is a wasteful number, since it uses less digits than its factorization.

11688701321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062609222.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 11688701321 in words is "eleven billion, six hundred eighty-eight million, seven hundred one thousand, three hundred twenty-one".