11121232231 has 8 divisors (see below), whose sum is σ = 11336572080. Its totient is φ = 10907595072.

The previous prime is 11121232223. The next prime is 11121232249. The reversal of 11121232231 is 13223212111.

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 11121232231 - 2³ = 11121232223 is a prime.

It is a super-2 number, since 2×11121232231² (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 = 11121232199 and 11121232208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121232271) 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, 412480 + ... + 438613.

It is an arithmetic number, because the mean of its divisors is an integer number (1417071510).

Almost surely, 2^11121232231 is an apocalyptic number.

11121232231 is a deficient number, since it is larger than the sum of its proper divisors (215339849).

11121232231 is an equidigital number, since it uses as much as digits as its factorization.

11121232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851345.

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

Adding to 11121232231 its reverse (13223212111), we get a palindrome (24344444342).

The spelling of 11121232231 in words is "eleven billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred thirty-one".