231111232201123 has 4 divisors (see below), whose sum is σ = 243274981264360. Its totient is φ = 218947483137888.

The previous prime is 231111232201097. The next prime is 231111232201159. The reversal of 231111232201123 is 321102232111132.

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 231111232201123 - 2¹⁷ = 231111232070051 is a prime.

It is a super-2 number, since 2×231111232201123² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231111232261123) 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, 6081874531590 + ... + 6081874531627.

It is an arithmetic number, because the mean of its divisors is an integer number (60818745316090).

Almost surely, 2^{231111232201123} is an apocalyptic number.

231111232201123 is a deficient number, since it is larger than the sum of its proper divisors (12163749063237).

231111232201123 is a wasteful number, since it uses less digits than its factorization.

231111232201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12163749063236.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 231111232201123 its reverse (321102232111132), we get a palindrome (552213464312255).

The spelling of 231111232201123 in words is "two hundred thirty-one trillion, one hundred eleven billion, two hundred thirty-two million, two hundred one thousand, one hundred twenty-three".