221211707201 has 8 divisors (see below), whose sum is σ = 226496049120. Its totient is φ = 215933723712.

The previous prime is 221211707191. The next prime is 221211707237. The reversal of 221211707201 is 102707112122.

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-221211707201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211707281) 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, 1519160 + ... + 1658393.

It is an arithmetic number, because the mean of its divisors is an integer number (28312006140).

Almost surely, 2^221211707201 is an apocalyptic number.

It is an amenable number.

221211707201 is a deficient number, since it is larger than the sum of its proper divisors (5284341919).

221211707201 is a wasteful number, since it uses less digits than its factorization.

221211707201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179215.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 221211707201 its reverse (102707112122), we get a palindrome (323918819323).

The spelling of 221211707201 in words is "two hundred twenty-one billion, two hundred eleven million, seven hundred seven thousand, two hundred one".