12521123 has 4 divisors (see below), whose sum is σ = 12584880. Its totient is φ = 12457368.

The previous prime is 12521107. The next prime is 12521137. The reversal of 12521123 is 32112521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32112521 = 7 ⋅4587503.

It is a cyclic number.

It is not a de Polignac number, because 12521123 - 2⁴ = 12521107 is a prime.

It is a super-2 number, since 2×12521123² = 313557042362258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12521623) 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, 31583 + ... + 31976.

It is an arithmetic number, because the mean of its divisors is an integer number (3146220).

Almost surely, 2^12521123 is an apocalyptic number.

12521123 is a deficient number, since it is larger than the sum of its proper divisors (63757).

12521123 is an equidigital number, since it uses as much as digits as its factorization.

12521123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63756.

The product of its digits is 120, while the sum is 17.

The square root of 12521123 is about 3538.5198883149. The cubic root of 12521123 is about 232.2100938224.

Adding to 12521123 its reverse (32112521), we get a palindrome (44633644).

The spelling of 12521123 in words is "twelve million, five hundred twenty-one thousand, one hundred twenty-three".