221100001201 has 4 divisors (see below), whose sum is σ = 222423953472. Its totient is φ = 219776048932.

The previous prime is 221100001183. The next prime is 221100001207. The reversal of 221100001201 is 102100001122.

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 221100001201 - 2⁹ = 221100000689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100001207) 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, 661975885 + ... + 661976218.

It is an arithmetic number, because the mean of its divisors is an integer number (55605988368).

Almost surely, 2^221100001201 is an apocalyptic number.

It is an amenable number.

221100001201 is a deficient number, since it is larger than the sum of its proper divisors (1323952271).

221100001201 is a wasteful number, since it uses less digits than its factorization.

221100001201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323952270.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221100001201 its reverse (102100001122), we get a palindrome (323200002323).

The spelling of 221100001201 in words is "two hundred twenty-one billion, one hundred million, one thousand, two hundred one".