11721174201 has 16 divisors (see below), whose sum is σ = 18943312320. Its totient is φ = 7103741760.

The previous prime is 11721174197. The next prime is 11721174203. The reversal of 11721174201 is 10247112711.

It is not a de Polignac number, because 11721174201 - 2² = 11721174197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11721174203) 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 15 ways as a sum of consecutive naturals, for example, 19732320 + ... + 19732913.

It is an arithmetic number, because the mean of its divisors is an integer number (1183957020).

Almost surely, 2^11721174201 is an apocalyptic number.

11721174201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11721174201 is a deficient number, since it is larger than the sum of its proper divisors (7222138119).

11721174201 is a wasteful number, since it uses less digits than its factorization.

11721174201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39465253 (or 39465247 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

Adding to 11721174201 its reverse (10247112711), we get a palindrome (21968286912).

The spelling of 11721174201 in words is "eleven billion, seven hundred twenty-one million, one hundred seventy-four thousand, two hundred one".