213223023123 has 16 divisors (see below), whose sum is σ = 310171234176. Its totient is φ = 129214135040.

The previous prime is 213223023109. The next prime is 213223023173. The reversal of 213223023123 is 321320322312.

It is a cyclic number.

It is not a de Polignac number, because 213223023123 - 2¹³ = 213223014931 is a prime.

It is a super-2 number, since 2×213223023123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213223023093 and 213223023102.

It is not an unprimeable number, because it can be changed into a prime (213223023173) 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, 70915 + ... + 656867.

It is an arithmetic number, because the mean of its divisors is an integer number (19385702136).

Almost surely, 2^213223023123 is an apocalyptic number.

213223023123 is a deficient number, since it is larger than the sum of its proper divisors (96948211053).

213223023123 is a wasteful number, since it uses less digits than its factorization.

213223023123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596994.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 213223023123 its reverse (321320322312), we get a palindrome (534543345435).

The spelling of 213223023123 in words is "two hundred thirteen billion, two hundred twenty-three million, twenty-three thousand, one hundred twenty-three".