11501124421 has 4 divisors (see below), whose sum is σ = 11619692812. Its totient is φ = 11382556032.

The previous prime is 11501124373. The next prime is 11501124431. The reversal of 11501124421 is 12442110511.

It is a happy number.

11501124421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12442110511 = 59 ⋅210883229.

It can be written as a sum of positive squares in 2 ways, for example, as 8665561921 + 2835562500 = 93089^2 + 53250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11501124421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11501124392 and 11501124401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11501124431) 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 3 ways as a sum of consecutive naturals, for example, 59284050 + ... + 59284243.

It is an arithmetic number, because the mean of its divisors is an integer number (2904923203).

Almost surely, 2^11501124421 is an apocalyptic number.

It is an amenable number.

11501124421 is a deficient number, since it is larger than the sum of its proper divisors (118568391).

11501124421 is an equidigital number, since it uses as much as digits as its factorization.

11501124421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118568390.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 11501124421 its reverse (12442110511), we get a palindrome (23943234932).

The spelling of 11501124421 in words is "eleven billion, five hundred one million, one hundred twenty-four thousand, four hundred twenty-one".