12510121 has 8 divisors (see below), whose sum is σ = 13527360. Its totient is φ = 11500752.

The previous prime is 12510109. The next prime is 12510133. The reversal of 12510121 is 12101521.

It is an interprime number because it is at equal distance from previous prime (12510109) and next prime (12510133).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12510121 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12510101) 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, 1590 + ... + 5248.

It is an arithmetic number, because the mean of its divisors is an integer number (1690920).

Almost surely, 2^12510121 is an apocalyptic number.

It is an amenable number.

12510121 is a deficient number, since it is larger than the sum of its proper divisors (1017239).

12510121 is a wasteful number, since it uses less digits than its factorization.

12510121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 12510121 is about 3536.9649418675. The cubic root of 12510121 is about 232.1420614771.

Adding to 12510121 its reverse (12101521), we get a palindrome (24611642).

The spelling of 12510121 in words is "twelve million, five hundred ten thousand, one hundred twenty-one".