11903029921 has 16 divisors (see below), whose sum is σ = 12739636800. Its totient is φ = 11088050688.

The previous prime is 11903029909. The next prime is 11903029933. The reversal of 11903029921 is 12992030911.

It is a happy number.

11903029921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11903029909) and next prime (11903029933).

It is a cyclic number.

It is not a de Polignac number, because 11903029921 - 2¹⁹ = 11902505633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11903029121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716121 + ... + 732553.

It is an arithmetic number, because the mean of its divisors is an integer number (796227300).

Almost surely, 2^11903029921 is an apocalyptic number.

It is an amenable number.

11903029921 is a deficient number, since it is larger than the sum of its proper divisors (836606879).

11903029921 is a wasteful number, since it uses less digits than its factorization.

11903029921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17088.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 11903029921 in words is "eleven billion, nine hundred three million, twenty-nine thousand, nine hundred twenty-one".