12112011021 has 16 divisors (see below), whose sum is σ = 17799098688. Its totient is φ = 7264934400.

The previous prime is 12112011011. The next prime is 12112011031. The reversal of 12112011021 is 12011021121.

It is an interprime number because it is at equal distance from previous prime (12112011011) and next prime (12112011031).

It is not a de Polignac number, because 12112011021 - 2⁶ = 12112010957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112010988 and 12112011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112011011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1888710 + ... + 1895111.

It is an arithmetic number, because the mean of its divisors is an integer number (1112443668).

Almost surely, 2^12112011021 is an apocalyptic number.

12112011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12112011021 is a deficient number, since it is larger than the sum of its proper divisors (5687087667).

12112011021 is a wasteful number, since it uses less digits than its factorization.

12112011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783932.

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

Adding to 12112011021 its reverse (12011021121), we get a palindrome (24123032142).

It can be divided in two parts, 121 and 12011021, that multiplied together give a palindrome (1453333541).

The spelling of 12112011021 in words is "twelve billion, one hundred twelve million, eleven thousand, twenty-one".