21353451113 has 8 divisors (see below), whose sum is σ = 21598617600. Its totient is φ = 21108401248.

The previous prime is 21353451101. The next prime is 21353451127. The reversal of 21353451113 is 31115435312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21353451113 - 2²⁶ = 21286342249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21353450113) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 370328 + ... + 424086.

It is an arithmetic number, because the mean of its divisors is an integer number (2699827200).

Almost surely, 2^21353451113 is an apocalyptic number.

It is an amenable number.

21353451113 is a deficient number, since it is larger than the sum of its proper divisors (245166487).

21353451113 is an equidigital number, since it uses as much as digits as its factorization.

21353451113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58311.

The product of its digits is 5400, while the sum is 29.

Adding to 21353451113 its reverse (31115435312), we get a palindrome (52468886425).

The spelling of 21353451113 in words is "twenty-one billion, three hundred fifty-three million, four hundred fifty-one thousand, one hundred thirteen".