221401303001 has 4 divisors (see below), whose sum is σ = 221762480292. Its totient is φ = 221040125712.

The previous prime is 221401302989. The next prime is 221401303031. The reversal of 221401303001 is 100303104122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97296581776 + 124104721225 = 311924^2 + 352285^2 .

It is a cyclic number.

It is not a de Polignac number, because 221401303001 - 2¹⁰ = 221401301977 is a prime.

It is a super-2 number, since 2×221401303001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221401303031) 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, 180587726 + ... + 180588951.

It is an arithmetic number, because the mean of its divisors is an integer number (55440620073).

Almost surely, 2^221401303001 is an apocalyptic number.

It is an amenable number.

221401303001 is a deficient number, since it is larger than the sum of its proper divisors (361177291).

221401303001 is an equidigital number, since it uses as much as digits as its factorization.

221401303001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361177290.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221401303001 its reverse (100303104122), we get a palindrome (321704407123).

The spelling of 221401303001 in words is "two hundred twenty-one billion, four hundred one million, three hundred three thousand, one".