13212312101 has 4 divisors (see below), whose sum is σ = 13667909100. Its totient is φ = 12756715104.

The previous prime is 13212312097. The next prime is 13212312173. The reversal of 13212312101 is 10121321231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10677088900 + 2535223201 = 103330^2 + 50351^2 .

It is a cyclic number.

It is not a de Polignac number, because 13212312101 - 2² = 13212312097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13212312101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212312401) 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, 227798456 + ... + 227798513.

It is an arithmetic number, because the mean of its divisors is an integer number (3416977275).

Almost surely, 2^13212312101 is an apocalyptic number.

It is an amenable number.

13212312101 is a deficient number, since it is larger than the sum of its proper divisors (455596999).

13212312101 is an equidigital number, since it uses as much as digits as its factorization.

13212312101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455596998.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13212312101 its reverse (10121321231), we get a palindrome (23333633332).

The spelling of 13212312101 in words is "thirteen billion, two hundred twelve million, three hundred twelve thousand, one hundred one".