2323222121221 has 2 divisors, whose sum is σ = 2323222121222. Its totient is φ = 2323222121220.

The previous prime is 2323222121219. The next prime is 2323222121251. The reversal of 2323222121221 is 1221212223232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2284012577025 + 39209544196 = 1511295^2 + 198014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2323222121221 - 2¹ = 2323222121219 is a prime.

It is a super-2 number, since 2×2323222121221² (a number of 26 digits) contains 22 as substring.

Together with 2323222121219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2323222121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1161611060610 + 1161611060611.

It is an arithmetic number, because the mean of its divisors is an integer number (1161611060611).

Almost surely, 2^{2323222121221} is an apocalyptic number.

It is an amenable number.

2323222121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2323222121221 is an equidigital number, since it uses as much as digits as its factorization.

2323222121221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

Adding to 2323222121221 its reverse (1221212223232), we get a palindrome (3544434344453).

The spelling of 2323222121221 in words is "two trillion, three hundred twenty-three billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".