21001023013333 has 8 divisors (see below), whose sum is σ = 23443002434016. Its totient is φ = 18647842844400.

The previous prime is 21001023013331. The next prime is 21001023013367. The reversal of 21001023013333 is 33331032010012.

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

It is not a de Polignac number, because 21001023013333 - 2¹ = 21001023013331 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001023013331) 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, 22199812438 + ... + 22199813383.

It is an arithmetic number, because the mean of its divisors is an integer number (2930375304252).

Almost surely, 2^{21001023013333} is an apocalyptic number.

It is an amenable number.

21001023013333 is a deficient number, since it is larger than the sum of its proper divisors (2441979420683).

21001023013333 is a wasteful number, since it uses less digits than its factorization.

21001023013333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44399625875.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21001023013333 its reverse (33331032010012), we get a palindrome (54332055023345).

The spelling of 21001023013333 in words is "twenty-one trillion, one billion, twenty-three million, thirteen thousand, three hundred thirty-three".