11042331221 has 4 divisors (see below), whose sum is σ = 11044134912. Its totient is φ = 11040527532.

The previous prime is 11042331217. The next prime is 11042331227. The reversal of 11042331221 is 12213324011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11042331221 - 2² = 11042331217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11042331193 and 11042331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11042331227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892631 + ... + 904916.

It is an arithmetic number, because the mean of its divisors is an integer number (2761033728).

Almost surely, 2^11042331221 is an apocalyptic number.

It is an amenable number.

11042331221 is a deficient number, since it is larger than the sum of its proper divisors (1803691).

11042331221 is an equidigital number, since it uses as much as digits as its factorization.

11042331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803690.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11042331221 its reverse (12213324011), we get a palindrome (23255655232).

The spelling of 11042331221 in words is "eleven billion, forty-two million, three hundred thirty-one thousand, two hundred twenty-one".