12521221336110 has 64 divisors (see below), whose sum is σ = 30069194803200. Its totient is φ = 3336963652992.

The previous prime is 12521221336103. The next prime is 12521221336147. The reversal of 12521221336110 is 1163312212521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 in 31 ways as a sum of consecutive naturals, for example, 446073156 + ... + 446101224.

It is an arithmetic number, because the mean of its divisors is an integer number (469831168800).

Almost surely, 2^{12521221336110} is an apocalyptic number.

12521221336110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12521221336110 is an abundant number, since it is smaller than the sum of its proper divisors (17547973467090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12521221336110 is a wasteful number, since it uses less digits than its factorization.

12521221336110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36585.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 12521221336110 its reverse (1163312212521), we get a palindrome (13684533548631).

The spelling of 12521221336110 in words is "twelve trillion, five hundred twenty-one billion, two hundred twenty-one million, three hundred thirty-six thousand, one hundred ten".