23330212221221 has 2 divisors, whose sum is σ = 23330212221222. Its totient is φ = 23330212221220.

The previous prime is 23330212221203. The next prime is 23330212221263. The reversal of 23330212221221 is 12212221203332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22487616736321 + 842595484900 = 4742111^2 + 917930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23330212221221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23330212220221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11665106110610 + 11665106110611.

It is an arithmetic number, because the mean of its divisors is an integer number (11665106110611).

Almost surely, 2^{23330212221221} is an apocalyptic number.

It is an amenable number.

23330212221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23330212221221 is an equidigital number, since it uses as much as digits as its factorization.

23330212221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 23330212221221 its reverse (12212221203332), we get a palindrome (35542433424553).

The spelling of 23330212221221 in words is "twenty-three trillion, three hundred thirty billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".