12501421402 has 16 divisors (see below), whose sum is σ = 18786286152. Its totient is φ = 6239338560.

The previous prime is 12501421399. The next prime is 12501421501. The reversal of 12501421402 is 20412410521.

It can be written as a sum of positive squares in 4 ways, for example, as 12501252481 + 168921 = 111809^2 + 411^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3489252 + ... + 3492832.

Almost surely, 2^12501421402 is an apocalyptic number.

12501421402 is a deficient number, since it is larger than the sum of its proper divisors (6284864750).

12501421402 is a wasteful number, since it uses less digits than its factorization.

12501421402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6273.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 12501421402 its reverse (20412410521), we get a palindrome (32913831923).

The spelling of 12501421402 in words is "twelve billion, five hundred one million, four hundred twenty-one thousand, four hundred two".