21223434233331 has 64 divisors (see below), whose sum is σ = 36319358845440. Its totient is φ = 12105664542720.

The previous prime is 21223434233293. The next prime is 21223434233333. The reversal of 21223434233331 is 13333243432212.

21223434233331 is a `hidden beast` number, since 2 + 1 + 223 + 4 + 3 + 423 + 3 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 21223434233331 - 2¹⁴ = 21223434216947 is a prime.

It is a super-2 number, since 2×21223434233331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21223434233333) 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, 234849451 + ... + 234939803.

It is an arithmetic number, because the mean of its divisors is an integer number (567489981960).

Almost surely, 2^{21223434233331} is an apocalyptic number.

21223434233331 is a deficient number, since it is larger than the sum of its proper divisors (15095924612109).

21223434233331 is a wasteful number, since it uses less digits than its factorization.

21223434233331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136913 (or 136907 counting only the distinct ones).

The product of its digits is 186624, while the sum is 36.

Adding to 21223434233331 its reverse (13333243432212), we get a palindrome (34556677665543).

The spelling of 21223434233331 in words is "twenty-one trillion, two hundred twenty-three billion, four hundred thirty-four million, two hundred thirty-three thousand, three hundred thirty-one".