23330021221 has 8 divisors (see below), whose sum is σ = 25127708760. Its totient is φ = 21532772352.

The previous prime is 23330021203. The next prime is 23330021233. The reversal of 23330021221 is 12212003332.

It can be written as a sum of positive squares in 4 ways, for example, as 3658556196 + 19671465025 = 60486^2 + 140255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23330021221 - 2¹⁷ = 23329890149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23330025221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5265 + ... + 216073.

It is an arithmetic number, because the mean of its divisors is an integer number (3140963595).

Almost surely, 2^23330021221 is an apocalyptic number.

It is an amenable number.

23330021221 is a deficient number, since it is larger than the sum of its proper divisors (1797687539).

23330021221 is a wasteful number, since it uses less digits than its factorization.

23330021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219335.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 23330021221 its reverse (12212003332), we get a palindrome (35542024553).

The spelling of 23330021221 in words is "twenty-three billion, three hundred thirty million, twenty-one thousand, two hundred twenty-one".