33223301231221 has 2 divisors, whose sum is σ = 33223301231222. Its totient is φ = 33223301231220.

The previous prime is 33223301231177. The next prime is 33223301231249. The reversal of 33223301231221 is 12213210332233.

It is a happy number.

It is an a-pointer prime, because the next prime (33223301231249) can be obtained adding 33223301231221 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32419927822500 + 803373408721 = 5693850^2 + 896311^2 .

It is an emirp because it is prime and its reverse (12213210332233) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33223301231221 - 2²⁵ = 33223267676789 is a prime.

It is a super-2 number, since 2×33223301231221² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33223301231221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33223301231251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16611650615610 + 16611650615611.

It is an arithmetic number, because the mean of its divisors is an integer number (16611650615611).

Almost surely, 2^{33223301231221} is an apocalyptic number.

It is an amenable number.

33223301231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33223301231221 is an equidigital number, since it uses as much as digits as its factorization.

33223301231221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 33223301231221 its reverse (12213210332233), we get a palindrome (45436511563454).

The spelling of 33223301231221 in words is "thirty-three trillion, two hundred twenty-three billion, three hundred one million, two hundred thirty-one thousand, two hundred twenty-one".