20201103243221 has 2 divisors, whose sum is σ = 20201103243222. Its totient is φ = 20201103243220.

The previous prime is 20201103243179. The next prime is 20201103243317. The reversal of 20201103243221 is 12234230110202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19819814283025 + 381288960196 = 4451945^2 + 617486^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201103243221 - 2¹⁰ = 20201103242197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201103243121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100551621610 + 10100551621611.

It is an arithmetic number, because the mean of its divisors is an integer number (10100551621611).

Almost surely, 2^{20201103243221} is an apocalyptic number.

It is an amenable number.

20201103243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201103243221 is an equidigital number, since it uses as much as digits as its factorization.

20201103243221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20201103243221 its reverse (12234230110202), we get a palindrome (32435333353423).

The spelling of 20201103243221 in words is "twenty trillion, two hundred one billion, one hundred three million, two hundred forty-three thousand, two hundred twenty-one".