21342011242 has 32 divisors (see below), whose sum is σ = 34260200640. Its totient is φ = 9935596800.

The previous prime is 21342011237. The next prime is 21342011263. The reversal of 21342011242 is 24211024312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6547009 + ... + 6550267.

It is an arithmetic number, because the mean of its divisors is an integer number (1070631270).

Almost surely, 2^21342011242 is an apocalyptic number.

21342011242 is a deficient number, since it is larger than the sum of its proper divisors (12918189398).

21342011242 is a wasteful number, since it uses less digits than its factorization.

21342011242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286.

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

Adding to 21342011242 its reverse (24211024312), we get a palindrome (45553035554).

The spelling of 21342011242 in words is "twenty-one billion, three hundred forty-two million, eleven thousand, two hundred forty-two".