221201221002 has 8 divisors (see below), whose sum is σ = 442402442016. Its totient is φ = 73733740332.

The previous prime is 221201221001. The next prime is 221201221037. The reversal of 221201221002 is 200122102122.

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

221201221002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (221201221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18433435078 + ... + 18433435089.

It is an arithmetic number, because the mean of its divisors is an integer number (55300305252).

Almost surely, 2^221201221002 is an apocalyptic number.

221201221002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221201221002 is a wasteful number, since it uses less digits than its factorization.

221201221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36866870172.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221201221002 its reverse (200122102122), we get a palindrome (421323323124).

The spelling of 221201221002 in words is "two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, two".