1121121231423 has 4 divisors (see below), whose sum is σ = 1494828308568. Its totient is φ = 747414154280.

The previous prime is 1121121231367. The next prime is 1121121231431. The reversal of 1121121231423 is 3241321211211.

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 1121121231423 - 2³³ = 1112531296831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121121231393 and 1121121231402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121121231023) 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, 186853538568 + ... + 186853538573.

It is an arithmetic number, because the mean of its divisors is an integer number (373707077142).

Almost surely, 2^{1121121231423} is an apocalyptic number.

1121121231423 is a deficient number, since it is larger than the sum of its proper divisors (373707077145).

1121121231423 is an equidigital number, since it uses as much as digits as its factorization.

1121121231423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373707077144.

The product of its digits is 576, while the sum is 24.

Adding to 1121121231423 its reverse (3241321211211), we get a palindrome (4362442442634).

The spelling of 1121121231423 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred thirty-one thousand, four hundred twenty-three".