13212100123 has 4 divisors (see below), whose sum is σ = 13228888840. Its totient is φ = 13195311408.

The previous prime is 13212100093. The next prime is 13212100141. The reversal of 13212100123 is 32100121231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32100121231 = 107 ⋅300001133.

It is a cyclic number.

It is not a de Polignac number, because 13212100123 - 2⁹ = 13212099611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13212100097 and 13212100106.

It is not an unprimeable number, because it can be changed into a prime (13212100183) 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, 8393178 + ... + 8394751.

It is an arithmetic number, because the mean of its divisors is an integer number (3307222210).

Almost surely, 2^13212100123 is an apocalyptic number.

13212100123 is a deficient number, since it is larger than the sum of its proper divisors (16788717).

13212100123 is an equidigital number, since it uses as much as digits as its factorization.

13212100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16788716.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13212100123 its reverse (32100121231), we get a palindrome (45312221354).

The spelling of 13212100123 in words is "thirteen billion, two hundred twelve million, one hundred thousand, one hundred twenty-three".