21020323013233 has 8 divisors (see below), whose sum is σ = 21152430835200. Its totient is φ = 20888253591408.

The previous prime is 21020323013231. The next prime is 21020323013251. The reversal of 21020323013233 is 33231032302012.

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 21020323013233 - 2¹ = 21020323013231 is a prime.

It is a super-2 number, since 2×21020323013233² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020323013198 and 21020323013207.

It is not an unprimeable number, because it can be changed into a prime (21020323013231) 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, 8501398 + ... + 10691791.

It is an arithmetic number, because the mean of its divisors is an integer number (2644053854400).

Almost surely, 2^{21020323013233} is an apocalyptic number.

It is an amenable number.

21020323013233 is a deficient number, since it is larger than the sum of its proper divisors (132107821967).

21020323013233 is a wasteful number, since it uses less digits than its factorization.

21020323013233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19200071.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21020323013233 its reverse (33231032302012), we get a palindrome (54251355315245).

The spelling of 21020323013233 in words is "twenty-one trillion, twenty billion, three hundred twenty-three million, thirteen thousand, two hundred thirty-three".