12112120001 has 4 divisors (see below), whose sum is σ = 12407537604. Its totient is φ = 11816702400.

The previous prime is 12112119991. The next prime is 12112120063. The reversal of 12112120001 is 10002121121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10002121121 = 1399 ⋅7149479.

It can be written as a sum of positive squares in 2 ways, for example, as 4300211776 + 7811908225 = 65576^2 + 88385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112120001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112120201) 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, 147708740 + ... + 147708821.

It is an arithmetic number, because the mean of its divisors is an integer number (3101884401).

Almost surely, 2^12112120001 is an apocalyptic number.

It is an amenable number.

12112120001 is a deficient number, since it is larger than the sum of its proper divisors (295417603).

12112120001 is an equidigital number, since it uses as much as digits as its factorization.

12112120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295417602.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12112120001 its reverse (10002121121), we get a palindrome (22114241122).

It can be divided in two parts, 1211 and 2120001, that added together give a palindrome (2121212).

The spelling of 12112120001 in words is "twelve billion, one hundred twelve million, one hundred twenty thousand, one".