221202221201 has 8 divisors (see below), whose sum is σ = 238241580864. Its totient is φ = 204166262160.

The previous prime is 221202221189. The next prime is 221202221209. The reversal of 221202221201 is 102122202122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221202221201 is a prime.

It is a super-2 number, since 2×221202221201² (a number of 23 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 221202221201.

It is not an unprimeable number, because it can be changed into a prime (221202221209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714245 + ... + 975986.

It is an arithmetic number, because the mean of its divisors is an integer number (29780197608).

Almost surely, 2^221202221201 is an apocalyptic number.

It is an amenable number.

221202221201 is a deficient number, since it is larger than the sum of its proper divisors (17039359663).

221202221201 is a wasteful number, since it uses less digits than its factorization.

221202221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700311.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221202221201 its reverse (102122202122), we get a palindrome (323324423323).

The spelling of 221202221201 in words is "two hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, two hundred one".