12112101011021 has 4 divisors (see below), whose sum is σ = 13213201102944. Its totient is φ = 11011000919100.

The previous prime is 12112101011011. The next prime is 12112101011033. The reversal of 12112101011021 is 12011010121121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12112101011021 - 2³⁰ = 12111027269197 is a prime.

It is a super-3 number, since 3×12112101011021³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112101010987 and 12112101011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112101011011) 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, 550550045945 + ... + 550550045966.

It is an arithmetic number, because the mean of its divisors is an integer number (3303300275736).

Almost surely, 2^{12112101011021} is an apocalyptic number.

12112101011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12112101011021 is a deficient number, since it is larger than the sum of its proper divisors (1101100091923).

12112101011021 is a wasteful number, since it uses less digits than its factorization.

12112101011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101100091922.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12112101011021 its reverse (12011010121121), we get a palindrome (24123111132142).

The spelling of 12112101011021 in words is "twelve trillion, one hundred twelve billion, one hundred one million, eleven thousand, twenty-one".