100121021000221 has 16 divisors (see below), whose sum is σ = 107947867023360. Its totient is φ = 92312077777920.

The previous prime is 100121021000219. The next prime is 100121021000227. The reversal of 100121021000221 is 122000120121001.

It is not a de Polignac number, because 100121021000221 - 2¹ = 100121021000219 is a prime.

It is a super-2 number, since 2×100121021000221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121021000227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191512660 + ... + 192034738.

It is an arithmetic number, because the mean of its divisors is an integer number (6746741688960).

Almost surely, 2^{100121021000221} is an apocalyptic number.

It is an amenable number.

100121021000221 is a deficient number, since it is larger than the sum of its proper divisors (7826846023139).

100121021000221 is a wasteful number, since it uses less digits than its factorization.

100121021000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539196.

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

Adding to 100121021000221 its reverse (122000120121001), we get a palindrome (222121141121222).

The spelling of 100121021000221 in words is "one hundred trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-one", and thus it is an aban number.