12521433402 has 48 divisors (see below), whose sum is σ = 28735215912. Its totient is φ = 3926983680.

The previous prime is 12521433401. The next prime is 12521433451. The reversal of 12521433402 is 20433412521.

12521433402 is a `hidden beast` number, since 1 + 252 + 1 + 4 + 3 + 3 + 402 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12465945801 + 55487601 = 111651^2 + 7449^2 .

It is not an unprimeable number, because it can be changed into a prime (12521433401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1359252 + ... + 1368432.

Almost surely, 2^12521433402 is an apocalyptic number.

12521433402 is an abundant number, since it is smaller than the sum of its proper divisors (16213782510).

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

12521433402 is a wasteful number, since it uses less digits than its factorization.

12521433402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13663 (or 13660 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 12521433402 its reverse (20433412521), we get a palindrome (32954845923).

The spelling of 12521433402 in words is "twelve billion, five hundred twenty-one million, four hundred thirty-three thousand, four hundred two".