12120110021 has 8 divisors (see below), whose sum is σ = 12590774784. Its totient is φ = 11654426160.

The previous prime is 12120109961. The next prime is 12120110027. The reversal of 12120110021 is 12001102121.

12120110021 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 12120110021 - 2⁶ = 12120109957 is a prime.

It is a super-2 number, since 2×12120110021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120109984 and 12120110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120110027) 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, 1240265 + ... + 1249998.

It is an arithmetic number, because the mean of its divisors is an integer number (1573846848).

Almost surely, 2^12120110021 is an apocalyptic number.

It is an amenable number.

12120110021 is a deficient number, since it is larger than the sum of its proper divisors (470664763).

12120110021 is a wasteful number, since it uses less digits than its factorization.

12120110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490451.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12120110021 its reverse (12001102121), we get a palindrome (24121212142).

The spelling of 12120110021 in words is "twelve billion, one hundred twenty million, one hundred ten thousand, twenty-one".