100120001201221 has 8 divisors (see below), whose sum is σ = 100981049702400. Its totient is φ = 99261557991600.

The previous prime is 100120001201197. The next prime is 100120001201279. The reversal of 100120001201221 is 122102100021001.

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 100120001201221 - 2³⁷ = 99982562247749 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 (100120001201321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651245701 + ... + 651399418.

It is an arithmetic number, because the mean of its divisors is an integer number (12622631212800).

Almost surely, 2^{100120001201221} is an apocalyptic number.

It is an amenable number.

100120001201221 is a deficient number, since it is larger than the sum of its proper divisors (861048501179).

100120001201221 is a wasteful number, since it uses less digits than its factorization.

100120001201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302645779.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100120001201221 its reverse (122102100021001), we get a palindrome (222222101222222).

The spelling of 100120001201221 in words is "one hundred trillion, one hundred twenty billion, one million, two hundred one thousand, two hundred twenty-one".