1231120112323 has 4 divisors (see below), whose sum is σ = 1233790655328. Its totient is φ = 1228449569320.

The previous prime is 1231120112317. The next prime is 1231120112357. The reversal of 1231120112323 is 3232110211321.

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 1231120112323 - 2⁵ = 1231120112291 is a prime.

It is a super-2 number, since 2×1231120112323² (a number of 25 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 = 1231120112294 and 1231120112303.

It is not an unprimeable number, because it can be changed into a prime (1231120112623) 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, 1335270811 + ... + 1335271732.

It is an arithmetic number, because the mean of its divisors is an integer number (308447663832).

Almost surely, 2^{1231120112323} is an apocalyptic number.

1231120112323 is a deficient number, since it is larger than the sum of its proper divisors (2670543005).

1231120112323 is an equidigital number, since it uses as much as digits as its factorization.

1231120112323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670543004.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1231120112323 its reverse (3232110211321), we get a palindrome (4463230323644).

The spelling of 1231120112323 in words is "one trillion, two hundred thirty-one billion, one hundred twenty million, one hundred twelve thousand, three hundred twenty-three".