100021011100121 has 4 divisors (see below), whose sum is σ = 100038958532772. Its totient is φ = 100003063667472.

The previous prime is 100021011100061. The next prime is 100021011100133. The reversal of 100021011100121 is 121001110120001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8228515994521 + 91792495105600 = 2868539^2 + 9580840^2 .

It is a cyclic number.

It is not a de Polignac number, because 100021011100121 - 2⁶ = 100021011100057 is a prime.

It is a super-2 number, since 2×100021011100121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021011100321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8973707966 + ... + 8973719111.

It is an arithmetic number, because the mean of its divisors is an integer number (25009739633193).

Almost surely, 2^{100021011100121} is an apocalyptic number.

It is an amenable number.

100021011100121 is a deficient number, since it is larger than the sum of its proper divisors (17947432651).

100021011100121 is an equidigital number, since it uses as much as digits as its factorization.

100021011100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17947432650.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 100021011100121 its reverse (121001110120001), we get a palindrome (221022121220122).

The spelling of 100021011100121 in words is "one hundred trillion, twenty-one billion, eleven million, one hundred thousand, one hundred twenty-one".