123203121133 has 4 divisors (see below), whose sum is σ = 123205095388. Its totient is φ = 123201146880.

The previous prime is 123203121131. The next prime is 123203121137. The reversal of 123203121133 is 331121302321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331121302321 = 3529 ⋅93828649.

It can be written as a sum of positive squares in 2 ways, for example, as 82577493769 + 40625627364 = 287363^2 + 201558^2 .

It is a cyclic number.

It is not a de Polignac number, because 123203121133 - 2¹ = 123203121131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123203121131) 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, 890358 + ... + 1019383.

It is an arithmetic number, because the mean of its divisors is an integer number (30801273847).

Almost surely, 2^123203121133 is an apocalyptic number.

It is an amenable number.

123203121133 is a deficient number, since it is larger than the sum of its proper divisors (1974255).

123203121133 is an equidigital number, since it uses as much as digits as its factorization.

123203121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974254.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123203121133 its reverse (331121302321), we get a palindrome (454324423454).

The spelling of 123203121133 in words is "one hundred twenty-three billion, two hundred three million, one hundred twenty-one thousand, one hundred thirty-three".