11213221331 has 8 divisors (see below), whose sum is σ = 12156824400. Its totient is φ = 10281196512.

The previous prime is 11213221309. The next prime is 11213221333. The reversal of 11213221331 is 13312231211.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11213221331 is a prime.

It is a super-2 number, since 2×11213221331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213221333) 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, 2892545 + ... + 2896418.

It is an arithmetic number, because the mean of its divisors is an integer number (1519603050).

Almost surely, 2^11213221331 is an apocalyptic number.

11213221331 is a deficient number, since it is larger than the sum of its proper divisors (943603069).

11213221331 is a wasteful number, since it uses less digits than its factorization.

11213221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789125.

The product of its digits is 216, while the sum is 20.

Adding to 11213221331 its reverse (13312231211), we get a palindrome (24525452542).

The spelling of 11213221331 in words is "eleven billion, two hundred thirteen million, two hundred twenty-one thousand, three hundred thirty-one".