21220221101233 has 16 divisors (see below), whose sum is σ = 26517763307520. Its totient is φ = 16496872376400.

The previous prime is 21220221101159. The next prime is 21220221101257. The reversal of 21220221101233 is 33210112202212.

It is a cyclic number.

It is not a de Polignac number, because 21220221101233 - 2¹⁷ = 21220220970161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220221101333) 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, 319673643 + ... + 319740016.

It is an arithmetic number, because the mean of its divisors is an integer number (1657360206720).

Almost surely, 2^{21220221101233} is an apocalyptic number.

It is an amenable number.

21220221101233 is a deficient number, since it is larger than the sum of its proper divisors (5297542206287).

21220221101233 is a wasteful number, since it uses less digits than its factorization.

21220221101233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639414108.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21220221101233 its reverse (33210112202212), we get a palindrome (54430333303445).

The spelling of 21220221101233 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred one thousand, two hundred thirty-three".