11113220231 has 2 divisors, whose sum is σ = 11113220232. Its totient is φ = 11113220230.

The previous prime is 11113220221. The next prime is 11113220249. The reversal of 11113220231 is 13202231111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11113220231 - 2²² = 11109025927 is a prime.

It is a super-2 number, since 2×11113220231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11113220221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556610115 + 5556610116.

It is an arithmetic number, because the mean of its divisors is an integer number (5556610116).

Almost surely, 2^11113220231 is an apocalyptic number.

11113220231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11113220231 is an equidigital number, since it uses as much as digits as its factorization.

11113220231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11113220231 its reverse (13202231111), we get a palindrome (24315451342).

The spelling of 11113220231 in words is "eleven billion, one hundred thirteen million, two hundred twenty thousand, two hundred thirty-one".