12012021121021 has 8 divisors (see below), whose sum is σ = 12400092089600. Its totient is φ = 11623986803520.

The previous prime is 12012021120991. The next prime is 12012021121039. The reversal of 12012021121021 is 12012112021021.

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 12012021121021 - 2⁵ = 12012021120989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012021120986 and 12012021121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012021121081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8495931 + ... + 9808408.

It is an arithmetic number, because the mean of its divisors is an integer number (1550011511200).

Almost surely, 2^{12012021121021} is an apocalyptic number.

It is an amenable number.

12012021121021 is a deficient number, since it is larger than the sum of its proper divisors (388070968579).

12012021121021 is a wasteful number, since it uses less digits than its factorization.

12012021121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18325539.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12012021121021 its reverse (12012112021021), we get a palindrome (24024133142042).

The spelling of 12012021121021 in words is "twelve trillion, twelve billion, twenty-one million, one hundred twenty-one thousand, twenty-one".