21223233020305 has 16 divisors (see below), whose sum is σ = 25638991999488. Its totient is φ = 16864533000000.

The previous prime is 21223233020299. The next prime is 21223233020333. The reversal of 21223233020305 is 50302033232212.

It is a happy number.

It is not a de Polignac number, because 21223233020305 - 2¹⁷ = 21223232889233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6589800 + ... + 9266710.

It is an arithmetic number, because the mean of its divisors is an integer number (1602436999968).

Almost surely, 2^{21223233020305} is an apocalyptic number.

It is an amenable number.

21223233020305 is a deficient number, since it is larger than the sum of its proper divisors (4415758979183).

21223233020305 is a wasteful number, since it uses less digits than its factorization.

21223233020305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687568.

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 21223233020305 its reverse (50302033232212), we get a palindrome (71525266252517).

The spelling of 21223233020305 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred thirty-three million, twenty thousand, three hundred five".