21313100331101 has 4 divisors (see below), whose sum is σ = 21313388571804. Its totient is φ = 21312812090400.

The previous prime is 21313100331071. The next prime is 21313100331109. The reversal of 21313100331101 is 10113300131312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14459569025476 + 6853531305625 = 3802574^2 + 2617925^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313100331101 - 2⁶ = 21313100331037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313100331109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144009410 + ... + 144157331.

It is an arithmetic number, because the mean of its divisors is an integer number (5328347142951).

Almost surely, 2^{21313100331101} is an apocalyptic number.

It is an amenable number.

21313100331101 is a deficient number, since it is larger than the sum of its proper divisors (288240703).

21313100331101 is an equidigital number, since it uses as much as digits as its factorization.

21313100331101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288240702.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 21313100331101 its reverse (10113300131312), we get a palindrome (31426400462413).

The spelling of 21313100331101 in words is "twenty-one trillion, three hundred thirteen billion, one hundred million, three hundred thirty-one thousand, one hundred one".