11121621524 has 48 divisors (see below), whose sum is σ = 21382652928. Its totient is φ = 5030581248.

The previous prime is 11121621509. The next prime is 11121621529. The reversal of 11121621524 is 42512612111.

It is a happy number.

11121621524 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 11121621493 and 11121621502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121621529) 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, 508829 + ... + 530235.

It is an arithmetic number, because the mean of its divisors is an integer number (445471936).

Almost surely, 2^11121621524 is an apocalyptic number.

It is an amenable number.

11121621524 is a deficient number, since it is larger than the sum of its proper divisors (10261031404).

11121621524 is a wasteful number, since it uses less digits than its factorization.

11121621524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21624 (or 21622 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The spelling of 11121621524 in words is "eleven billion, one hundred twenty-one million, six hundred twenty-one thousand, five hundred twenty-four".