12521415025412 has 6 divisors (see below), whose sum is σ = 21912476294478. Its totient is φ = 6260707512704.

The previous prime is 12521415025373. The next prime is 12521415025421. The reversal of 12521415025412 is 21452051412521.

It can be written as a sum of positive squares in only one way, i.e., 12318316984516 + 203098040896 = 3509746^2 + 450664^2 .

It is a super-2 number, since 2×12521415025412² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565176878173 + ... + 1565176878180.

It is an arithmetic number, because the mean of its divisors is an integer number (3652079382413).

Almost surely, 2^{12521415025412} is an apocalyptic number.

It is an amenable number.

12521415025412 is a deficient number, since it is larger than the sum of its proper divisors (9391061269066).

12521415025412 is a wasteful number, since it uses less digits than its factorization.

12521415025412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130353756357 (or 3130353756355 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

Adding to 12521415025412 its reverse (21452051412521), we get a palindrome (33973466437933).

The spelling of 12521415025412 in words is "twelve trillion, five hundred twenty-one billion, four hundred fifteen million, twenty-five thousand, four hundred twelve".