100121022222021 has 40 divisors (see below), whose sum is σ = 158400055104984. Its totient is φ = 62805681607680.

The previous prime is 100121022222019. The next prime is 100121022222043. The reversal of 100121022222021 is 120222220121001.

It is a happy number.

100121022222021 is a `hidden beast` number, since 10 + 0 + 1 + 210 + 222 + 220 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19246523571396 + 80874498650625 = 4387086^2 + 8993025^2 .

It is not a de Polignac number, because 100121022222021 - 2¹ = 100121022222019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121022221985 and 100121022222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121022229021) 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 39 ways as a sum of consecutive naturals, for example, 3246120 + ... + 14518241.

Almost surely, 2^{100121022222021} is an apocalyptic number.

It is an amenable number.

100121022222021 is a deficient number, since it is larger than the sum of its proper divisors (58279032882963).

100121022222021 is a wasteful number, since it uses less digits than its factorization.

100121022222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17768483 (or 17768474 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 100121022222021 its reverse (120222220121001), we get a palindrome (220343242343022).

The spelling of 100121022222021 in words is "one hundred trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, twenty-one".