100221201221221 has 8 divisors (see below), whose sum is σ = 102814196220288. Its totient is φ = 97635281244000.

The previous prime is 100221201221201. The next prime is 100221201221237. The reversal of 100221201221221 is 122122102122001.

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 100221201221221 - 2¹⁷ = 100221201090149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221201221201) 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, 1768726765 + ... + 1768783426.

It is an arithmetic number, because the mean of its divisors is an integer number (12851774527536).

Almost surely, 2^{100221201221221} is an apocalyptic number.

It is an amenable number.

100221201221221 is a deficient number, since it is larger than the sum of its proper divisors (2592994999067).

100221201221221 is an equidigital number, since it uses as much as digits as its factorization.

100221201221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537510923.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 100221201221221 its reverse (122122102122001), we get a palindrome (222343303343222).

The spelling of 100221201221221 in words is "one hundred trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-one".