20232321111221 has 2 divisors, whose sum is σ = 20232321111222. Its totient is φ = 20232321111220.

The previous prime is 20232321111209. The next prime is 20232321111251. The reversal of 20232321111221 is 12211112323202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20228900499025 + 3420612196 = 4497655^2 + 58486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20232321111221 is a prime.

It is a super-2 number, since 2×20232321111221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20232321111251) 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, 10116160555610 + 10116160555611.

It is an arithmetic number, because the mean of its divisors is an integer number (10116160555611).

Almost surely, 2^{20232321111221} is an apocalyptic number.

It is an amenable number.

20232321111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20232321111221 is an equidigital number, since it uses as much as digits as its factorization.

20232321111221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20232321111221 its reverse (12211112323202), we get a palindrome (32443433434423).

The spelling of 20232321111221 in words is "twenty trillion, two hundred thirty-two billion, three hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".