1213123023323 has 16 divisors (see below), whose sum is σ = 1239102044160. Its totient is φ = 1187433000000.

The previous prime is 1213123023317. The next prime is 1213123023341. The reversal of 1213123023323 is 3233203213121.

It is a cyclic number.

It is not a de Polignac number, because 1213123023323 - 2²⁰ = 1213121974747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213123023292 and 1213123023301.

It is not an unprimeable number, because it can be changed into a prime (1213123023313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8053448 + ... + 8202698.

It is an arithmetic number, because the mean of its divisors is an integer number (77443877760).

Almost surely, 2^{1213123023323} is an apocalyptic number.

1213123023323 is a deficient number, since it is larger than the sum of its proper divisors (25979020837).

1213123023323 is a wasteful number, since it uses less digits than its factorization.

1213123023323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150218.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1213123023323 its reverse (3233203213121), we get a palindrome (4446326236444).

The spelling of 1213123023323 in words is "one trillion, two hundred thirteen billion, one hundred twenty-three million, twenty-three thousand, three hundred twenty-three".