221321020120201 has 4 divisors (see below), whose sum is σ = 221602241239312. Its totient is φ = 221039799001092.

The previous prime is 221321020120199. The next prime is 221321020120223. The reversal of 221321020120201 is 102021020123122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221321020120201 - 2¹ = 221321020120199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221321020120271) 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 in 3 ways as a sum of consecutive naturals, for example, 140610558375 + ... + 140610559948.

It is an arithmetic number, because the mean of its divisors is an integer number (55400560309828).

Almost surely, 2^{221321020120201} is an apocalyptic number.

It is an amenable number.

221321020120201 is a deficient number, since it is larger than the sum of its proper divisors (281221119111).

221321020120201 is an equidigital number, since it uses as much as digits as its factorization.

221321020120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281221119110.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221321020120201 its reverse (102021020123122), we get a palindrome (323342040243323).

The spelling of 221321020120201 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, twenty million, one hundred twenty thousand, two hundred one".