221121221211201 has 8 divisors (see below), whose sum is σ = 294850269235744. Its totient is φ = 147403160330400.

The previous prime is 221121221211197. The next prime is 221121221211257. The reversal of 221121221211201 is 102112122121122.

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

It is not a de Polignac number, because 221121221211201 - 2² = 221121221211197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121221211001) 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, 2746738975 + ... + 2746819476.

It is an arithmetic number, because the mean of its divisors is an integer number (36856283654468).

Almost surely, 2^{221121221211201} is an apocalyptic number.

It is an amenable number.

221121221211201 is a deficient number, since it is larger than the sum of its proper divisors (73729048024543).

221121221211201 is a wasteful number, since it uses less digits than its factorization.

221121221211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5493571871.

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

Adding to 221121221211201 its reverse (102112122121122), we get a palindrome (323233343332323).

The spelling of 221121221211201 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred one".