11131242021 has 40 divisors (see below), whose sum is σ = 16955468640. Its totient is φ = 7275435552.

The previous prime is 11131242011. The next prime is 11131242037. The reversal of 11131242021 is 12024213111.

11131242021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11131242021 - 2²¹ = 11129144869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11131241985 and 11131242003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131242011) 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 39 ways as a sum of consecutive naturals, for example, 1894330 + ... + 1900196.

It is an arithmetic number, because the mean of its divisors is an integer number (423886716).

Almost surely, 2^11131242021 is an apocalyptic number.

It is an amenable number.

11131242021 is a deficient number, since it is larger than the sum of its proper divisors (5824226619).

11131242021 is an equidigital number, since it uses as much as digits as its factorization.

11131242021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335 (or 6326 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11131242021 its reverse (12024213111), we get a palindrome (23155455132).

The spelling of 11131242021 in words is "eleven billion, one hundred thirty-one million, two hundred forty-two thousand, twenty-one".