12103021 has 8 divisors (see below), whose sum is σ = 13988160. Its totient is φ = 10256928.

The previous prime is 12103009. The next prime is 12103043. The reversal of 12103021 is 12030121.

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 12103021 - 2⁹ = 12102509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102989 and 12103007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101021) 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, 9091 + ... + 10336.

It is an arithmetic number, because the mean of its divisors is an integer number (1748520).

Almost surely, 2^12103021 is an apocalyptic number.

It is an amenable number.

12103021 is a deficient number, since it is larger than the sum of its proper divisors (1885139).

12103021 is an equidigital number, since it uses as much as digits as its factorization.

12103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19523.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12103021 is about 3478.9396373033. The cubic root of 12103021 is about 229.5961469992.

Adding to 12103021 its reverse (12030121), we get a palindrome (24133142).

Subtracting from 12103021 its reverse (12030121), we obtain a square (72900 = 270²).

The spelling of 12103021 in words is "twelve million, one hundred three thousand, twenty-one".