12001241021 has 16 divisors (see below), whose sum is σ = 14982904320. Its totient is φ = 9338917680.

The previous prime is 12001241011. The next prime is 12001241027. The reversal of 12001241021 is 12014210021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12001241021 - 2³⁰ = 10927499197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001240987 and 12001241005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001241027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48551 + ... + 162356.

It is an arithmetic number, because the mean of its divisors is an integer number (936431520).

Almost surely, 2^12001241021 is an apocalyptic number.

12001241021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001241021 is a deficient number, since it is larger than the sum of its proper divisors (2981663299).

12001241021 is a wasteful number, since it uses less digits than its factorization.

12001241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211664.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12001241021 its reverse (12014210021), we get a palindrome (24015451042).

The spelling of 12001241021 in words is "twelve billion, one million, two hundred forty-one thousand, twenty-one".