100122202222121 has 4 divisors (see below), whose sum is σ = 100122240586500. Its totient is φ = 100122163857744.

The previous prime is 100122202222051. The next prime is 100122202222157. The reversal of 100122202222121 is 121222202221001.

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 28812621972121 + 71309580250000 = 5367739^2 + 8444500^2 .

It is a cyclic number.

It is not a de Polignac number, because 100122202222121 - 2³⁰ = 100121128480297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100122202222093 and 100122202222102.

It is not an unprimeable number, because it can be changed into a prime (100122202222321) 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, 14957366 + ... + 20590463.

It is an arithmetic number, because the mean of its divisors is an integer number (25030560146625).

Almost surely, 2^{100122202222121} is an apocalyptic number.

It is an amenable number.

100122202222121 is a deficient number, since it is larger than the sum of its proper divisors (38364379).

100122202222121 is an equidigital number, since it uses as much as digits as its factorization.

100122202222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38364378.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 100122202222121 its reverse (121222202221001), we get a palindrome (221344404443122).

The spelling of 100122202222121 in words is "one hundred trillion, one hundred twenty-two billion, two hundred two million, two hundred twenty-two thousand, one hundred twenty-one".