21042131030 has 16 divisors (see below), whose sum is σ = 37891812960. Its totient is φ = 8413301952.

The previous prime is 21042131029. The next prime is 21042131087. The reversal of 21042131030 is 3013124012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418850 + ... + 466389.

It is an arithmetic number, because the mean of its divisors is an integer number (2368238310).

Almost surely, 2^21042131030 is an apocalyptic number.

21042131030 is a deficient number, since it is larger than the sum of its proper divisors (16849681930).

21042131030 is a wasteful number, since it uses less digits than its factorization.

21042131030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887623.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21042131030 its reverse (3013124012), we get a palindrome (24055255042).

The spelling of 21042131030 in words is "twenty-one billion, forty-two million, one hundred thirty-one thousand, thirty".