11111023331231 has 4 divisors (see below), whose sum is σ = 11115924534792. Its totient is φ = 11106122127672.

The previous prime is 11111023331159. The next prime is 11111023331251. The reversal of 11111023331231 is 13213332011111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11111023331231 - 2¹⁴ = 11111023314847 is a prime.

It is a super-2 number, since 2×11111023331231² (a number of 27 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 = 11111023331197 and 11111023331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111023331251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2450598380 + ... + 2450602913.

It is an arithmetic number, because the mean of its divisors is an integer number (2778981133698).

Almost surely, 2^{11111023331231} is an apocalyptic number.

11111023331231 is a deficient number, since it is larger than the sum of its proper divisors (4901203561).

11111023331231 is an equidigital number, since it uses as much as digits as its factorization.

11111023331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901203560.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 11111023331231 its reverse (13213332011111), we get a palindrome (24324355342342).

The spelling of 11111023331231 in words is "eleven trillion, one hundred eleven billion, twenty-three million, three hundred thirty-one thousand, two hundred thirty-one".