12011021121 has 8 divisors (see below), whose sum is σ = 17470576224. Its totient is φ = 7279406720.

The previous prime is 12011021059. The next prime is 12011021137. The reversal of 12011021121 is 12112011021.

12011021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12011021121 - 2¹¹ = 12011019073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011021097 and 12011021106.

It is not an unprimeable number, because it can be changed into a prime (12011020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181985136 + ... + 181985201.

It is an arithmetic number, because the mean of its divisors is an integer number (2183822028).

Almost surely, 2^12011021121 is an apocalyptic number.

12011021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011021121 is a deficient number, since it is larger than the sum of its proper divisors (5459555103).

12011021121 is a wasteful number, since it uses less digits than its factorization.

12011021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363970351.

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

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

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

The spelling of 12011021121 in words is "twelve billion, eleven million, twenty-one thousand, one hundred twenty-one".