21241320142 has 48 divisors (see below), whose sum is σ = 38725644672. Its totient is φ = 8558194320.

The previous prime is 21241320137. The next prime is 21241320179. The reversal of 21241320142 is 24102314212.

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 23 ways as a sum of consecutive naturals, for example, 646033 + ... + 678115.

It is an arithmetic number, because the mean of its divisors is an integer number (806784264).

Almost surely, 2^21241320142 is an apocalyptic number.

21241320142 is a deficient number, since it is larger than the sum of its proper divisors (17484324530).

21241320142 is a wasteful number, since it uses less digits than its factorization.

21241320142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32261 (or 32242 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21241320142 its reverse (24102314212), we get a palindrome (45343634354).

The spelling of 21241320142 in words is "twenty-one billion, two hundred forty-one million, three hundred twenty thousand, one hundred forty-two".