11123123331 has 8 divisors (see below), whose sum is σ = 15192558864. Its totient is φ = 7234551680.

The previous prime is 11123123321. The next prime is 11123123351. The reversal of 11123123331 is 13332132111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11123123331 - 2²¹ = 11121026179 is a prime.

It is a super-2 number, since 2×11123123331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11123123298 and 11123123307.

It is not an unprimeable number, because it can be changed into a prime (11123123321) 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, 45215826 + ... + 45216071.

It is an arithmetic number, because the mean of its divisors is an integer number (1899069858).

Almost surely, 2^11123123331 is an apocalyptic number.

11123123331 is a deficient number, since it is larger than the sum of its proper divisors (4069435533).

11123123331 is an equidigital number, since it uses as much as digits as its factorization.

11123123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90431941.

The product of its digits is 324, while the sum is 21.

Adding to 11123123331 its reverse (13332132111), we get a palindrome (24455255442).

The spelling of 11123123331 in words is "eleven billion, one hundred twenty-three million, one hundred twenty-three thousand, three hundred thirty-one".