21023021303233 has 8 divisors (see below), whose sum is σ = 21842922306600. Its totient is φ = 20209451582208.

The previous prime is 21023021303159. The next prime is 21023021303243. The reversal of 21023021303233 is 33230312032012.

It can be written as a sum of positive squares in 4 ways, for example, as 2391513788304 + 18631507514929 = 1546452^2 + 4316423^2 .

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 21023021303233 - 2⁹ = 21023021302721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21023021303198 and 21023021303207.

It is not an unprimeable number, because it can be changed into a prime (21023021303243) 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, 1582813816 + ... + 1582827097.

It is an arithmetic number, because the mean of its divisors is an integer number (2730365288325).

Almost surely, 2^{21023021303233} is an apocalyptic number.

It is an amenable number.

21023021303233 is a deficient number, since it is larger than the sum of its proper divisors (819901003367).

21023021303233 is a wasteful number, since it uses less digits than its factorization.

21023021303233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165641171.

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

Adding to 21023021303233 its reverse (33230312032012), we get a palindrome (54253333335245).

The spelling of 21023021303233 in words is "twenty-one trillion, twenty-three billion, twenty-one million, three hundred three thousand, two hundred thirty-three".