21100212130133 has 4 divisors (see below), whose sum is σ = 21102485134368. Its totient is φ = 21097939125900.

The previous prime is 21100212130121. The next prime is 21100212130147. The reversal of 21100212130133 is 33103121200112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21100212130133 - 2¹⁶ = 21100212064597 is a prime.

It is a super-2 number, since 2×21100212130133² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100212130163) 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 3 ways as a sum of consecutive naturals, for example, 1136488193 + ... + 1136506758.

It is an arithmetic number, because the mean of its divisors is an integer number (5275621283592).

Almost surely, 2^{21100212130133} is an apocalyptic number.

It is an amenable number.

21100212130133 is a deficient number, since it is larger than the sum of its proper divisors (2273004235).

21100212130133 is an equidigital number, since it uses as much as digits as its factorization.

21100212130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273004234.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21100212130133 its reverse (33103121200112), we get a palindrome (54203333330245).

The spelling of 21100212130133 in words is "twenty-one trillion, one hundred billion, two hundred twelve million, one hundred thirty thousand, one hundred thirty-three".