12042121 has 8 divisors (see below), whose sum is σ = 14821184. Its totient is φ = 9527760.

The previous prime is 12042113. The next prime is 12042127. The reversal of 12042121 is 12124021.

It is a happy number.

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 12042121 - 2³ = 12042113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

12042121 is a modest number, since divided by 2121 gives 1204 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12042127) 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, 66075 + ... + 66256.

It is an arithmetic number, because the mean of its divisors is an integer number (1852648).

Almost surely, 2^12042121 is an apocalyptic number.

It is an amenable number.

12042121 is a deficient number, since it is larger than the sum of its proper divisors (2779063).

12042121 is a wasteful number, since it uses less digits than its factorization.

12042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132351.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 12042121 is about 3470.1759321395. The cubic root of 12042121 is about 229.2104051979.

Adding to 12042121 its reverse (12124021), we get a palindrome (24166142).

The spelling of 12042121 in words is "twelve million, forty-two thousand, one hundred twenty-one".