21333212223 has 16 divisors (see below), whose sum is σ = 28952150016. Its totient is φ = 13970426400.

The previous prime is 21333212221. The next prime is 21333212249. The reversal of 21333212223 is 32221233312.

It is not a de Polignac number, because 21333212223 - 2¹ = 21333212221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21333212193 and 21333212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238711 + ... + 315672.

It is an arithmetic number, because the mean of its divisors is an integer number (1809509376).

Almost surely, 2^21333212223 is an apocalyptic number.

21333212223 is a deficient number, since it is larger than the sum of its proper divisors (7618937793).

21333212223 is a wasteful number, since it uses less digits than its factorization.

21333212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554614.

The product of its digits is 2592, while the sum is 24.

Adding to 21333212223 its reverse (32221233312), we get a palindrome (53554445535).

The spelling of 21333212223 in words is "twenty-one billion, three hundred thirty-three million, two hundred twelve thousand, two hundred twenty-three".