21010110121333 has 4 divisors (see below), whose sum is σ = 21010553354560. Its totient is φ = 21009666888108.

The previous prime is 21010110121331. The next prime is 21010110121433. The reversal of 21010110121333 is 33312101101012.

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 21010110121333 - 2¹ = 21010110121331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010110121333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010110121331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221545503 + ... + 221640316.

It is an arithmetic number, because the mean of its divisors is an integer number (5252638338640).

Almost surely, 2^{21010110121333} is an apocalyptic number.

It is an amenable number.

21010110121333 is a deficient number, since it is larger than the sum of its proper divisors (443233227).

21010110121333 is an equidigital number, since it uses as much as digits as its factorization.

21010110121333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443233226.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21010110121333 its reverse (33312101101012), we get a palindrome (54322211222345).

The spelling of 21010110121333 in words is "twenty-one trillion, ten billion, one hundred ten million, one hundred twenty-one thousand, three hundred thirty-three".