11124131221 has 8 divisors (see below), whose sum is σ = 12983788800. Its totient is φ = 9332097648.

The previous prime is 11124131197. The next prime is 11124131231. The reversal of 11124131221 is 12213142111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11124131221 - 2⁵ = 11124131189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11124131231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16905646 + ... + 16906303.

It is an arithmetic number, because the mean of its divisors is an integer number (1622973600).

Almost surely, 2^11124131221 is an apocalyptic number.

It is an amenable number.

11124131221 is a deficient number, since it is larger than the sum of its proper divisors (1859657579).

11124131221 is an equidigital number, since it uses as much as digits as its factorization.

11124131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33812003.

The product of its digits is 96, while the sum is 19.

Adding to 11124131221 its reverse (12213142111), we get a palindrome (23337273332).

The spelling of 11124131221 in words is "eleven billion, one hundred twenty-four million, one hundred thirty-one thousand, two hundred twenty-one".