233211220221 has 32 divisors (see below), whose sum is σ = 360699091200. Its totient is φ = 131276090880.

The previous prime is 233211220219. The next prime is 233211220271. The reversal of 233211220221 is 122022112332.

It is not a de Polignac number, because 233211220221 - 2¹ = 233211220219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233211220271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270831 + ... + 734691.

It is an arithmetic number, because the mean of its divisors is an integer number (11271846600).

Almost surely, 2^233211220221 is an apocalyptic number.

233211220221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

233211220221 is a deficient number, since it is larger than the sum of its proper divisors (127487870979).

233211220221 is a wasteful number, since it uses less digits than its factorization.

233211220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464229.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 233211220221 its reverse (122022112332), we get a palindrome (355233332553).

The spelling of 233211220221 in words is "two hundred thirty-three billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-one".