21101305883 has 16 divisors (see below), whose sum is σ = 24428818176. Its totient is φ = 17852456160.

The previous prime is 21101305847. The next prime is 21101305889. The reversal of 21101305883 is 38850310112.

It is not a de Polignac number, because 21101305883 - 2²⁸ = 20832870427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21101305889) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 636293 + ... + 668633.

It is an arithmetic number, because the mean of its divisors is an integer number (1526801136).

Almost surely, 2^21101305883 is an apocalyptic number.

21101305883 is a deficient number, since it is larger than the sum of its proper divisors (3327512293).

21101305883 is a wasteful number, since it uses less digits than its factorization.

21101305883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33554.

The product of its (nonzero) digits is 5760, while the sum is 32.

Adding to 21101305883 its reverse (38850310112), we get a palindrome (59951615995).

The spelling of 21101305883 in words is "twenty-one billion, one hundred one million, three hundred five thousand, eight hundred eighty-three".