12112101021 has 8 divisors (see below), whose sum is σ = 16162613280. Its totient is φ = 8068161392.

The previous prime is 12112100999. The next prime is 12112101031. The reversal of 12112101021 is 12010121121.

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 12112101021 - 2⁵ = 12112100989 is a prime.

It is a super-2 number, since 2×12112101021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12112100988 and 12112101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112101031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638855 + ... + 1646228.

It is an arithmetic number, because the mean of its divisors is an integer number (2020326660).

Almost surely, 2^12112101021 is an apocalyptic number.

It is an amenable number.

12112101021 is a deficient number, since it is larger than the sum of its proper divisors (4050512259).

12112101021 is a wasteful number, since it uses less digits than its factorization.

12112101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286315.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12112101021 its reverse (12010121121), we get a palindrome (24122222142).

The spelling of 12112101021 in words is "twelve billion, one hundred twelve million, one hundred one thousand, twenty-one".