123031121033 has 4 divisors (see below), whose sum is σ = 123032009748. Its totient is φ = 123030232320.

The previous prime is 123031120991. The next prime is 123031121111. The reversal of 123031121033 is 330121130321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 89618205769 + 33412915264 = 299363^2 + 182792^2 .

It is a cyclic number.

It is not a de Polignac number, because 123031121033 - 2³² = 118736153737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123031120996 and 123031121014.

It is not an unprimeable number, because it can be changed into a prime (123031126033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187028 + ... + 530133.

It is an arithmetic number, because the mean of its divisors is an integer number (30758002437).

Almost surely, 2^123031121033 is an apocalyptic number.

It is an amenable number.

123031121033 is a deficient number, since it is larger than the sum of its proper divisors (888715).

123031121033 is an equidigital number, since it uses as much as digits as its factorization.

123031121033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888714.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123031121033 its reverse (330121130321), we get a palindrome (453152251354).

The spelling of 123031121033 in words is "one hundred twenty-three billion, thirty-one million, one hundred twenty-one thousand, thirty-three".