21321303121233 has 64 divisors (see below), whose sum is σ = 34783906176000. Its totient is φ = 12851736348672.

The previous prime is 21321303121193. The next prime is 21321303121241. The reversal of 21321303121233 is 33212130312312.

21321303121233 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 1 + 303 + 121 + 233 = 666.

It is not a de Polignac number, because 21321303121233 - 2¹⁷ = 21321302990161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21321303121197 and 21321303121206.

It is not an unprimeable number, because it can be changed into a prime (21321303141233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6604228 + ... + 9287541.

It is an arithmetic number, because the mean of its divisors is an integer number (543498534000).

Almost surely, 2^{21321303121233} is an apocalyptic number.

It is an amenable number.

21321303121233 is a deficient number, since it is larger than the sum of its proper divisors (13462603054767).

21321303121233 is a wasteful number, since it uses less digits than its factorization.

21321303121233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15891911 (or 15891905 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21321303121233 its reverse (33212130312312), we get a palindrome (54533433433545).

The spelling of 21321303121233 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred three million, one hundred twenty-one thousand, two hundred thirty-three".