11700707721 has 8 divisors (see below), whose sum is σ = 15606489120. Its totient is φ = 7797699072.

The previous prime is 11700707717. The next prime is 11700707723. The reversal of 11700707721 is 12770700711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11700707721 - 2² = 11700707717 is a prime.

It is a super-3 number, since 3×11700707721³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (11700707723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683320 + ... + 700233.

It is an arithmetic number, because the mean of its divisors is an integer number (1950811140).

Almost surely, 2^11700707721 is an apocalyptic number.

It is an amenable number.

11700707721 is a deficient number, since it is larger than the sum of its proper divisors (3905781399).

11700707721 is a wasteful number, since it uses less digits than its factorization.

11700707721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386375.

The product of its (nonzero) digits is 4802, while the sum is 33.

The spelling of 11700707721 in words is "eleven billion, seven hundred million, seven hundred seven thousand, seven hundred twenty-one".