12112100021 has 8 divisors (see below), whose sum is σ = 13844342400. Its totient is φ = 10380343248.

The previous prime is 12112099997. The next prime is 12112100023. The reversal of 12112100021 is 12000121121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12112100021 - 2¹⁰ = 12112098997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112099975 and 12112100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66281 + ... + 169166.

It is an arithmetic number, because the mean of its divisors is an integer number (1730542800).

Almost surely, 2^12112100021 is an apocalyptic number.

It is an amenable number.

12112100021 is a deficient number, since it is larger than the sum of its proper divisors (1732242379).

12112100021 is an equidigital number, since it uses as much as digits as its factorization.

12112100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242803.

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

Adding to 12112100021 its reverse (12000121121), we get a palindrome (24112221142).

The spelling of 12112100021 in words is "twelve billion, one hundred twelve million, one hundred thousand, twenty-one".