21113011353 has 16 divisors (see below), whose sum is σ = 32243875200. Its totient is φ = 12037702656.

The previous prime is 21113011327. The next prime is 21113011357. The reversal of 21113011353 is 35311031112.

It is not a de Polignac number, because 21113011353 - 2⁸ = 21113011097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21113011357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1110150 + ... + 1129007.

It is an arithmetic number, because the mean of its divisors is an integer number (2015242200).

Almost surely, 2^21113011353 is an apocalyptic number.

It is an amenable number.

21113011353 is a deficient number, since it is larger than the sum of its proper divisors (11130863847).

21113011353 is a wasteful number, since it uses less digits than its factorization.

21113011353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239616.

The product of its (nonzero) digits is 270, while the sum is 21.

Adding to 21113011353 its reverse (35311031112), we get a palindrome (56424042465).

The spelling of 21113011353 in words is "twenty-one billion, one hundred thirteen million, eleven thousand, three hundred fifty-three".