21103130234 has 32 divisors (see below), whose sum is σ = 34687569600. Its totient is φ = 9584270080.

The previous prime is 21103130219. The next prime is 21103130261. The reversal of 21103130234 is 43203130112.

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, 4078469 + ... + 4083639.

It is an arithmetic number, because the mean of its divisors is an integer number (1083986550).

Almost surely, 2^21103130234 is an apocalyptic number.

21103130234 is a deficient number, since it is larger than the sum of its proper divisors (13584439366).

21103130234 is a wasteful number, since it uses less digits than its factorization.

21103130234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21103130234 its reverse (43203130112), we get a palindrome (64306260346).

The spelling of 21103130234 in words is "twenty-one billion, one hundred three million, one hundred thirty thousand, two hundred thirty-four".