20443101303221 has 2 divisors, whose sum is σ = 20443101303222. Its totient is φ = 20443101303220.

The previous prime is 20443101303217. The next prime is 20443101303337. The reversal of 20443101303221 is 12230310134402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12053742422500 + 8389358880721 = 3471850^2 + 2896439^2 .

It is a cyclic number.

It is not a de Polignac number, because 20443101303221 - 2² = 20443101303217 is a prime.

It is a super-2 number, since 2×20443101303221² (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 (20443101303421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221550651610 + 10221550651611.

It is an arithmetic number, because the mean of its divisors is an integer number (10221550651611).

Almost surely, 2^{20443101303221} is an apocalyptic number.

It is an amenable number.

20443101303221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443101303221 is an equidigital number, since it uses as much as digits as its factorization.

20443101303221 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 20443101303221 its reverse (12230310134402), we get a palindrome (32673411437623).

The spelling of 20443101303221 in words is "twenty trillion, four hundred forty-three billion, one hundred one million, three hundred three thousand, two hundred twenty-one".