21231201130402 has 8 divisors (see below), whose sum is σ = 31850032606956. Its totient is φ = 10614523594752.

The previous prime is 21231201130361. The next prime is 21231201130463. The reversal of 21231201130402 is 20403110213212.

It can be written as a sum of positive squares in 2 ways, for example, as 20486948115001 + 744253015401 = 4526251^2 + 862701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 538460583 + ... + 538500010.

Almost surely, 2^{21231201130402} is an apocalyptic number.

21231201130402 is a deficient number, since it is larger than the sum of its proper divisors (10618831476554).

21231201130402 is a wasteful number, since it uses less digits than its factorization.

21231201130402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076970452.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21231201130402 its reverse (20403110213212), we get a palindrome (41634311343614).

The spelling of 21231201130402 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred one million, one hundred thirty thousand, four hundred two".