21210020223233 has 8 divisors (see below), whose sum is σ = 21293989376352. Its totient is φ = 21126062232576.

The previous prime is 21210020223193. The next prime is 21210020223239. The reversal of 21210020223233 is 33232202001212.

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 21210020223233 - 2¹⁸ = 21210019961089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210020223199 and 21210020223208.

It is not an unprimeable number, because it can be changed into a prime (21210020223239) 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, 1027466 + ... + 6593612.

It is an arithmetic number, because the mean of its divisors is an integer number (2661748672044).

Almost surely, 2^{21210020223233} is an apocalyptic number.

It is an amenable number.

21210020223233 is a deficient number, since it is larger than the sum of its proper divisors (83969153119).

21210020223233 is a wasteful number, since it uses less digits than its factorization.

21210020223233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581231.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21210020223233 its reverse (33232202001212), we get a palindrome (54442222224445).

The spelling of 21210020223233 in words is "twenty-one trillion, two hundred ten billion, twenty million, two hundred twenty-three thousand, two hundred thirty-three".