12101211021 has 8 divisors (see below), whose sum is σ = 16211417824. Its totient is φ = 8029239120.

The previous prime is 12101211011. The next prime is 12101211043. The reversal of 12101211021 is 12011210121.

12101211021 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 not a de Polignac number, because 12101211021 - 2⁷ = 12101210893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101210988 and 12101211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101211011) 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, 9557986 + ... + 9559251.

It is an arithmetic number, because the mean of its divisors is an integer number (2026427228).

Almost surely, 2^12101211021 is an apocalyptic number.

It is an amenable number.

12101211021 is a deficient number, since it is larger than the sum of its proper divisors (4110206803).

12101211021 is a wasteful number, since it uses less digits than its factorization.

12101211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19117451.

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

Adding to 12101211021 its reverse (12011210121), we get a palindrome (24112421142).

The spelling of 12101211021 in words is "twelve billion, one hundred one million, two hundred eleven thousand, twenty-one".