12010121121021 has 4 divisors (see below), whose sum is σ = 16013494828032. Its totient is φ = 8006747414012.

The previous prime is 12010121120989. The next prime is 12010121121041. The reversal of 12010121121021 is 12012112101021.

It is a happy number.

12010121121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12010121121021 - 2⁵ = 12010121120989 is a prime.

It is a super-3 number, since 3×12010121121021³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010121121041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001686853501 + ... + 2001686853506.

It is an arithmetic number, because the mean of its divisors is an integer number (4003373707008).

Almost surely, 2^{12010121121021} is an apocalyptic number.

It is an amenable number.

12010121121021 is a deficient number, since it is larger than the sum of its proper divisors (4003373707011).

12010121121021 is an equidigital number, since it uses as much as digits as its factorization.

12010121121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003373707010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12010121121021 its reverse (12012112101021), we get a palindrome (24022233222042).

The spelling of 12010121121021 in words is "twelve trillion, ten billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".