12121601 has 8 divisors (see below), whose sum is σ = 12799680. Its totient is φ = 11447568.

The previous prime is 12121583. The next prime is 12121619. The reversal of 12121601 is 10612121.

It is an interprime number because it is at equal distance from previous prime (12121583) and next prime (12121619).

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 12121601 - 2⁶ = 12121537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6740 + ... + 8346.

It is an arithmetic number, because the mean of its divisors is an integer number (1599960).

Almost surely, 2^12121601 is an apocalyptic number.

It is an amenable number.

12121601 is a deficient number, since it is larger than the sum of its proper divisors (678079).

12121601 is a wasteful number, since it uses less digits than its factorization.

12121601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 12121601 is about 3481.6089671300. The cubic root of 12121601 is about 229.7135754036.

Adding to 12121601 its reverse (10612121), we get a palindrome (22733722).

The spelling of 12121601 in words is "twelve million, one hundred twenty-one thousand, six hundred one".