21210112113133 has 8 divisors (see below), whose sum is σ = 21562695374616. Its totient is φ = 20857686158400.

The previous prime is 21210112113119. The next prime is 21210112113149. The reversal of 21210112113133 is 33131121101212.

It can be written as a sum of positive squares in 4 ways, for example, as 42401810889 + 21167710302244 = 205917^2 + 4600838^2 .

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 21210112113133 - 2⁹ = 21210112112621 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 (21210112123133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39054766 + ... + 39594127.

It is an arithmetic number, because the mean of its divisors is an integer number (2695336921827).

Almost surely, 2^{21210112113133} is an apocalyptic number.

It is an amenable number.

21210112113133 is a deficient number, since it is larger than the sum of its proper divisors (352583261483).

21210112113133 is an equidigital number, since it uses as much as digits as its factorization.

21210112113133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78653375.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21210112113133 its reverse (33131121101212), we get a palindrome (54341233214345).

The spelling of 21210112113133 in words is "twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred thirteen thousand, one hundred thirty-three".