221211210220001 has 8 divisors (see below), whose sum is σ = 224808545568000. Its totient is φ = 217633804708320.

The previous prime is 221211210219971. The next prime is 221211210220009. The reversal of 221211210220001 is 100022012112122.

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 221211210220001 - 2²² = 221211206025697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211210220009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4982436701 + ... + 4982481098.

It is an arithmetic number, because the mean of its divisors is an integer number (28101068196000).

Almost surely, 2^{221211210220001} is an apocalyptic number.

It is an amenable number.

221211210220001 is a deficient number, since it is larger than the sum of its proper divisors (3597335347999).

221211210220001 is an equidigital number, since it uses as much as digits as its factorization.

221211210220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9964918159.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221211210220001 its reverse (100022012112122), we get a palindrome (321233222332123).

The spelling of 221211210220001 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred ten million, two hundred twenty thousand, one".