12112100001 has 12 divisors (see below), whose sum is σ = 17496880128. Its totient is φ = 8073983544.

The previous prime is 12112099997. The next prime is 12112100023. The reversal of 12112100001 is 10000121121.

It is a happy number.

It is not a de Polignac number, because 12112100001 - 2² = 12112099997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12112100801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50596 + ... + 163658.

It is an arithmetic number, because the mean of its divisors is an integer number (1458073344).

Almost surely, 2^12112100001 is an apocalyptic number.

It is an amenable number.

12112100001 is a deficient number, since it is larger than the sum of its proper divisors (5384780127).

12112100001 is a wasteful number, since it uses less digits than its factorization.

12112100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124972 (or 124969 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12112100001 its reverse (10000121121), we get a palindrome (22112221122).

The spelling of 12112100001 in words is "twelve billion, one hundred twelve million, one hundred thousand, one".