11131233421 has 12 divisors (see below), whose sum is σ = 14125721760. Its totient is φ = 8673687960.

The previous prime is 11131233413. The next prime is 11131233437. The reversal of 11131233421 is 12433213111.

11131233421 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 11131233421 - 2³ = 11131233413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131233392 and 11131233401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131233401) 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 11 ways as a sum of consecutive naturals, for example, 10325281 + ... + 10326358.

It is an arithmetic number, because the mean of its divisors is an integer number (1177143480).

Almost surely, 2^11131233421 is an apocalyptic number.

11131233421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11131233421 is a deficient number, since it is larger than the sum of its proper divisors (2994488339).

11131233421 is a wasteful number, since it uses less digits than its factorization.

11131233421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20651664 (or 20651657 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 11131233421 its reverse (12433213111), we get a palindrome (23564446532).

The spelling of 11131233421 in words is "eleven billion, one hundred thirty-one million, two hundred thirty-three thousand, four hundred twenty-one".