100000220002121 has 4 divisors (see below), whose sum is σ = 103448503450500. Its totient is φ = 96551936553744.

The previous prime is 100000220002103. The next prime is 100000220002127. The reversal of 100000220002121 is 121200022000001.

It is a happy number.

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 27719803801600 + 72280416200521 = 5264960^2 + 8501789^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000220002121 - 2²⁶ = 100000152893257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100000220002127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724141724146 + ... + 1724141724203.

It is an arithmetic number, because the mean of its divisors is an integer number (25862125862625).

Almost surely, 2^{100000220002121} is an apocalyptic number.

It is an amenable number.

100000220002121 is a deficient number, since it is larger than the sum of its proper divisors (3448283448379).

100000220002121 is an equidigital number, since it uses as much as digits as its factorization.

100000220002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448283448378.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100000220002121 its reverse (121200022000001), we get a palindrome (221200242002122).

The spelling of 100000220002121 in words is "one hundred trillion, two hundred twenty million, two thousand, one hundred twenty-one".