12521102451 has 32 divisors (see below), whose sum is σ = 19689965568. Its totient is φ = 6977495040.

The previous prime is 12521102441. The next prime is 12521102459. The reversal of 12521102451 is 15420112521.

It is a happy number.

It is not a de Polignac number, because 12521102451 - 2²² = 12516908147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12521102459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53470 + ... + 167036.

It is an arithmetic number, because the mean of its divisors is an integer number (615311424).

Almost surely, 2^12521102451 is an apocalyptic number.

12521102451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12521102451 is a deficient number, since it is larger than the sum of its proper divisors (7168863117).

12521102451 is a wasteful number, since it uses less digits than its factorization.

12521102451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113851.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 12521102451 its reverse (15420112521), we get a palindrome (27941214972).

The spelling of 12521102451 in words is "twelve billion, five hundred twenty-one million, one hundred two thousand, four hundred fifty-one".