12521116 has 6 divisors (see below), whose sum is σ = 21911960. Its totient is φ = 6260556.

The previous prime is 12521107. The next prime is 12521137. The reversal of 12521116 is 61112521.

It is a junction number, because it is equal to n+sod(n) for n = 12521093 and 12521102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565136 + ... + 1565143.

Almost surely, 2^12521116 is an apocalyptic number.

It is an amenable number.

12521116 is a deficient number, since it is larger than the sum of its proper divisors (9390844).

12521116 is a wasteful number, since it uses less digits than its factorization.

12521116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130283 (or 3130281 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 12521116 is about 3538.5188992006. The cubic root of 12521116 is about 232.2100505497.

Adding to 12521116 its reverse (61112521), we get a palindrome (73633637).

The spelling of 12521116 in words is "twelve million, five hundred twenty-one thousand, one hundred sixteen".