12112100220001 has 4 divisors (see below), whose sum is σ = 12123181740052. Its totient is φ = 12101018699952.

The previous prime is 12112100219977. The next prime is 12112100220007. The reversal of 12112100220001 is 10002200121121.

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 10887096193600 + 1225004026401 = 3299560^2 + 1106799^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112100220001 - 2¹⁵ = 12112100187233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112100220007) 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, 5540758386 + ... + 5540760571.

It is an arithmetic number, because the mean of its divisors is an integer number (3030795435013).

Almost surely, 2^{12112100220001} is an apocalyptic number.

It is an amenable number.

12112100220001 is a deficient number, since it is larger than the sum of its proper divisors (11081520051).

12112100220001 is a wasteful number, since it uses less digits than its factorization.

12112100220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11081520050.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12112100220001 its reverse (10002200121121), we get a palindrome (22114300341122).

It can be divided in two parts, 121 and 12100220001, that multiplied together give a square (1464126620121 = 1210011²).

The spelling of 12112100220001 in words is "twelve trillion, one hundred twelve billion, one hundred million, two hundred twenty thousand, one".