21140103442 has 16 divisors (see below), whose sum is σ = 32345100000. Its totient is φ = 10359486720.

The previous prime is 21140103421. The next prime is 21140103559. The reversal of 21140103442 is 24430104112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231567 + ... + 309682.

It is an arithmetic number, because the mean of its divisors is an integer number (2021568750).

Almost surely, 2^21140103442 is an apocalyptic number.

21140103442 is a deficient number, since it is larger than the sum of its proper divisors (11204996558).

21140103442 is a wasteful number, since it uses less digits than its factorization.

21140103442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541641.

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

Adding to 21140103442 its reverse (24430104112), we get a palindrome (45570207554).

The spelling of 21140103442 in words is "twenty-one billion, one hundred forty million, one hundred three thousand, four hundred forty-two".