2123123103133 has 4 divisors (see below), whose sum is σ = 2125388977180. Its totient is φ = 2120857229088.

The previous prime is 2123123103103. The next prime is 2123123103169. The reversal of 2123123103133 is 3313013213212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101090294809 + 2022032808324 = 317947^2 + 1421982^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123123103133 - 2⁹ = 2123123102621 is a prime.

It is a super-2 number, since 2×2123123103133² (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 = 2123123103098 and 2123123103107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123123103103) 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, 1132935618 + ... + 1132937491.

It is an arithmetic number, because the mean of its divisors is an integer number (531347244295).

Almost surely, 2^{2123123103133} is an apocalyptic number.

It is an amenable number.

2123123103133 is a deficient number, since it is larger than the sum of its proper divisors (2265874047).

2123123103133 is an equidigital number, since it uses as much as digits as its factorization.

2123123103133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265874046.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 2123123103133 its reverse (3313013213212), we get a palindrome (5436136316345).

The spelling of 2123123103133 in words is "two trillion, one hundred twenty-three billion, one hundred twenty-three million, one hundred three thousand, one hundred thirty-three".