231533533412123 has 4 divisors (see below), whose sum is σ = 235902090646368. Its totient is φ = 227164976177880.

The previous prime is 231533533412119. The next prime is 231533533412171. The reversal of 231533533412123 is 321214335335132.

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 231533533412123 - 2² = 231533533412119 is a prime.

It is a super-2 number, since 2×231533533412123² (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 (231533533492123) 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, 2184278617043 + ... + 2184278617148.

It is an arithmetic number, because the mean of its divisors is an integer number (58975522661592).

Almost surely, 2^{231533533412123} is an apocalyptic number.

231533533412123 is a deficient number, since it is larger than the sum of its proper divisors (4368557234245).

231533533412123 is an equidigital number, since it uses as much as digits as its factorization.

231533533412123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368557234244.

The product of its digits is 583200, while the sum is 41.

Adding to 231533533412123 its reverse (321214335335132), we get a palindrome (552747868747255).

The spelling of 231533533412123 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-three million, four hundred twelve thousand, one hundred twenty-three".