21120031131230 has 16 divisors (see below), whose sum is σ = 38016285297120. Its totient is φ = 8447961505632.

The previous prime is 21120031131229. The next prime is 21120031131247. The reversal of 21120031131230 is 3213113002112.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 4603970 + ... + 7964709.

It is an arithmetic number, because the mean of its divisors is an integer number (2376017831070).

Almost surely, 2^{21120031131230} is an apocalyptic number.

21120031131230 is a deficient number, since it is larger than the sum of its proper divisors (16896254165890).

21120031131230 is a wasteful number, since it uses less digits than its factorization.

21120031131230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12736723.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21120031131230 its reverse (3213113002112), we get a palindrome (24333144133342).

The spelling of 21120031131230 in words is "twenty-one trillion, one hundred twenty billion, thirty-one million, one hundred thirty-one thousand, two hundred thirty".