12103241200021 has 4 divisors (see below), whose sum is σ = 12103273584544. Its totient is φ = 12103208815500.

The previous prime is 12103241200007. The next prime is 12103241200103. The reversal of 12103241200021 is 12000214230121.

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 12103241200021 - 2⁷ = 12103241199893 is a prime.

It is a super-2 number, since 2×12103241200021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103241200321) 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, 15625035 + ... + 16381336.

It is an arithmetic number, because the mean of its divisors is an integer number (3025818396136).

Almost surely, 2^{12103241200021} is an apocalyptic number.

It is an amenable number.

12103241200021 is a deficient number, since it is larger than the sum of its proper divisors (32384523).

12103241200021 is an equidigital number, since it uses as much as digits as its factorization.

12103241200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32384522.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12103241200021 its reverse (12000214230121), we get a palindrome (24103455430142).

The spelling of 12103241200021 in words is "twelve trillion, one hundred three billion, two hundred forty-one million, two hundred thousand, twenty-one".