100220121000121 has 2 divisors, whose sum is σ = 100220121000122. Its totient is φ = 100220121000120.

The previous prime is 100220121000113. The next prime is 100220121000169. The reversal of 100220121000121 is 121000121022001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100220121000000 + 121 = 10011000^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 100220121000121 - 2³ = 100220121000113 is a prime.

It is not a weakly prime, because it can be changed into another prime (100220121000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110060500060 + 50110060500061.

It is an arithmetic number, because the mean of its divisors is an integer number (50110060500061).

Almost surely, 2^{100220121000121} is an apocalyptic number.

It is an amenable number.

100220121000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

100220121000121 is an equidigital number, since it uses as much as digits as its factorization.

100220121000121 is an evil number, because the sum of its binary digits is even.

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

Adding to 100220121000121 its reverse (121000121022001), we get a palindrome (221220242022122).

The spelling of 100220121000121 in words is "one hundred trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twenty-one", and thus it is an aban number.