221313434020201 has 4 divisors (see below), whose sum is σ = 221313709800832. Its totient is φ = 221313158239572.

The previous prime is 221313434020163. The next prime is 221313434020267. The reversal of 221313434020201 is 102020434313122.

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 221313434020201 - 2¹⁷ = 221313433889129 is a prime.

It is a super-2 number, since 2×221313434020201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221313434020201.

It is not an unprimeable number, because it can be changed into a prime (221313434020501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136683045 + ... + 138292738.

It is an arithmetic number, because the mean of its divisors is an integer number (55328427450208).

Almost surely, 2^{221313434020201} is an apocalyptic number.

It is an amenable number.

221313434020201 is a deficient number, since it is larger than the sum of its proper divisors (275780631).

221313434020201 is an equidigital number, since it uses as much as digits as its factorization.

221313434020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275780630.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 221313434020201 its reverse (102020434313122), we get a palindrome (323333868333323).

The spelling of 221313434020201 in words is "two hundred twenty-one trillion, three hundred thirteen billion, four hundred thirty-four million, twenty thousand, two hundred one".