12451521421552 has 20 divisors (see below), whose sum is σ = 24125962502520. Its totient is φ = 6225466582208.

The previous prime is 12451521421529. The next prime is 12451521421601. The reversal of 12451521421552 is 25512412515421.

It is a super-2 number, since 2×12451521421552² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18033583 + ... + 18711310.

It is an arithmetic number, because the mean of its divisors is an integer number (1206298125126).

Almost surely, 2^{12451521421552} is an apocalyptic number.

It is an amenable number.

12451521421552 is a deficient number, since it is larger than the sum of its proper divisors (11674441080968).

12451521421552 is a wasteful number, since it uses less digits than its factorization.

12451521421552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36766080 (or 36766074 counting only the distinct ones).

The product of its digits is 160000, while the sum is 40.

Adding to 12451521421552 its reverse (25512412515421), we get a palindrome (37963933936973).

The spelling of 12451521421552 in words is "twelve trillion, four hundred fifty-one billion, five hundred twenty-one million, four hundred twenty-one thousand, five hundred fifty-two".