2123311333123 has 4 divisors (see below), whose sum is σ = 2123325578200. Its totient is φ = 2123297088048.

The previous prime is 2123311333063. The next prime is 2123311333139. The reversal of 2123311333123 is 3213331133212.

It is a happy number.

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 2123311333123 - 2²⁵ = 2123277778691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123311333091 and 2123311333100.

It is not an unprimeable number, because it can be changed into a prime (2123311333153) 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, 6896565 + ... + 7197862.

It is an arithmetic number, because the mean of its divisors is an integer number (530831394550).

Almost surely, 2^{2123311333123} is an apocalyptic number.

2123311333123 is a deficient number, since it is larger than the sum of its proper divisors (14245077).

2123311333123 is a wasteful number, since it uses less digits than its factorization.

2123311333123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14245076.

The product of its digits is 5832, while the sum is 28.

Adding to 2123311333123 its reverse (3213331133212), we get a palindrome (5336642466335).

The spelling of 2123311333123 in words is "two trillion, one hundred twenty-three billion, three hundred eleven million, three hundred thirty-three thousand, one hundred twenty-three".