123213223123 has 4 divisors (see below), whose sum is σ = 123220905048. Its totient is φ = 123205541200.

The previous prime is 123213223121. The next prime is 123213223127. The reversal of 123213223123 is 321322312321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321322312321 = 47 ⋅6836644943.

It is a cyclic number.

It is not a de Polignac number, because 123213223123 - 2¹ = 123213223121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123213223121) 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, 3816853 + ... + 3848998.

It is an arithmetic number, because the mean of its divisors is an integer number (30805226262).

Almost surely, 2^123213223123 is an apocalyptic number.

123213223123 is a deficient number, since it is larger than the sum of its proper divisors (7681925).

123213223123 is an equidigital number, since it uses as much as digits as its factorization.

123213223123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7681924.

The product of its digits is 2592, while the sum is 25.

Adding to 123213223123 its reverse (321322312321), we get a palindrome (444535535444).

The spelling of 123213223123 in words is "one hundred twenty-three billion, two hundred thirteen million, two hundred twenty-three thousand, one hundred twenty-three".