11131221331 has 8 divisors (see below), whose sum is σ = 11223500400. Its totient is φ = 11039116800.

The previous prime is 11131221329. The next prime is 11131221337. The reversal of 11131221331 is 13312213111.

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 11131221331 - 2¹ = 11131221329 is a prime.

It is a super-2 number, since 2×11131221331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131221299 and 11131221308.

It is not an unprimeable number, because it can be changed into a prime (11131221337) 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, 86031 + ... + 172231.

It is an arithmetic number, because the mean of its divisors is an integer number (1402937550).

Almost surely, 2^11131221331 is an apocalyptic number.

11131221331 is a deficient number, since it is larger than the sum of its proper divisors (92279069).

11131221331 is an equidigital number, since it uses as much as digits as its factorization.

11131221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87269.

The product of its digits is 108, while the sum is 19.

Adding to 11131221331 its reverse (13312213111), we get a palindrome (24443434442).

The spelling of 11131221331 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty-one".