233021211221 has 4 divisors (see below), whose sum is σ = 233048432352. Its totient is φ = 232993990092.

The previous prime is 233021211121. The next prime is 233021211239. The reversal of 233021211221 is 122112120332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233021211221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233021211193 and 233021211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233021211121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13597721 + ... + 13614846.

It is an arithmetic number, because the mean of its divisors is an integer number (58262108088).

Almost surely, 2^233021211221 is an apocalyptic number.

It is an amenable number.

233021211221 is a deficient number, since it is larger than the sum of its proper divisors (27221131).

233021211221 is an equidigital number, since it uses as much as digits as its factorization.

233021211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27221130.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 233021211221 its reverse (122112120332), we get a palindrome (355133331553).

The spelling of 233021211221 in words is "two hundred thirty-three billion, twenty-one million, two hundred eleven thousand, two hundred twenty-one".