213223212123 has 16 divisors (see below), whose sum is σ = 294186086400. Its totient is φ = 137226997440.

The previous prime is 213223212071. The next prime is 213223212131. The reversal of 213223212123 is 321212322312.

It is not a de Polignac number, because 213223212123 - 2¹⁷ = 213223081051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213223212093 and 213223212102.

It is not an unprimeable number, because it can be changed into a prime (213223212133) 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, 2764803 + ... + 2840876.

It is an arithmetic number, because the mean of its divisors is an integer number (18386630400).

Almost surely, 2^213223212123 is an apocalyptic number.

213223212123 is a deficient number, since it is larger than the sum of its proper divisors (80962874277).

213223212123 is a wasteful number, since it uses less digits than its factorization.

213223212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606122.

The product of its digits is 1728, while the sum is 24.

Adding to 213223212123 its reverse (321212322312), we get a palindrome (534435534435).

The spelling of 213223212123 in words is "two hundred thirteen billion, two hundred twenty-three million, two hundred twelve thousand, one hundred twenty-three".