1111231323121 has 4 divisors (see below), whose sum is σ = 1111254547312. Its totient is φ = 1111208098932.

The previous prime is 1111231323101. The next prime is 1111231323151. The reversal of 1111231323121 is 1213231321111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111231323121 - 2⁹ = 1111231322609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111231323092 and 1111231323101.

It is not an unprimeable number, because it can be changed into a prime (1111231323101) 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, 11540175 + ... + 11636068.

It is an arithmetic number, because the mean of its divisors is an integer number (277813636828).

Almost surely, 2^{1111231323121} is an apocalyptic number.

It is an amenable number.

1111231323121 is a deficient number, since it is larger than the sum of its proper divisors (23224191).

1111231323121 is an equidigital number, since it uses as much as digits as its factorization.

1111231323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23224190.

The product of its digits is 216, while the sum is 22.

Adding to 1111231323121 its reverse (1213231321111), we get a palindrome (2324462644232).

The spelling of 1111231323121 in words is "one trillion, one hundred eleven billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty-one".