11722121072 has 20 divisors (see below), whose sum is σ = 23265552576. Its totient is φ = 5718107520.

The previous prime is 11722121063. The next prime is 11722121083. The reversal of 11722121072 is 27012122711.

It is a congruent number.

It is an unprimeable number.

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, 8933888 + ... + 8935199.

Almost surely, 2^11722121072 is an apocalyptic number.

It is an amenable number.

11722121072 is a deficient number, since it is larger than the sum of its proper divisors (11543431504).

11722121072 is a wasteful number, since it uses less digits than its factorization.

11722121072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17869136 (or 17869130 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 11722121072 its reverse (27012122711), we get a palindrome (38734243783).

The spelling of 11722121072 in words is "eleven billion, seven hundred twenty-two million, one hundred twenty-one thousand, seventy-two".