221211111222201 has 8 divisors (see below), whose sum is σ = 294950026845504. Its totient is φ = 147473134873520.

The previous prime is 221211111222193. The next prime is 221211111222203. The reversal of 221211111222201 is 102222111112122.

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

It is a cyclic number.

It is not a de Polignac number, because 221211111222201 - 2³ = 221211111222193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211111222203) 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, 234268941 + ... + 235211306.

It is an arithmetic number, because the mean of its divisors is an integer number (36868753355688).

Almost surely, 2^{221211111222201} is an apocalyptic number.

It is an amenable number.

221211111222201 is a deficient number, since it is larger than the sum of its proper divisors (73738915623303).

221211111222201 is a wasteful number, since it uses less digits than its factorization.

221211111222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469637311.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221211111222201 its reverse (102222111112122), we get a palindrome (323433222334323).

The spelling of 221211111222201 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred one".