11121223231 has 8 divisors (see below), whose sum is σ = 11311718400. Its totient is φ = 10930794840.

The previous prime is 11121223229. The next prime is 11121223259. The reversal of 11121223231 is 13232212111.

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 11121223231 - 2¹ = 11121223229 is a prime.

It is a super-2 number, since 2×11121223231² (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 = 11121223199 and 11121223208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121223291) 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, 412866 + ... + 438976.

It is an arithmetic number, because the mean of its divisors is an integer number (1413964800).

Almost surely, 2^11121223231 is an apocalyptic number.

11121223231 is a deficient number, since it is larger than the sum of its proper divisors (190495169).

11121223231 is an equidigital number, since it uses as much as digits as its factorization.

11121223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33389.

The product of its digits is 144, while the sum is 19.

Adding to 11121223231 its reverse (13232212111), we get a palindrome (24353435342).

The spelling of 11121223231 in words is "eleven billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-one".