180001020202121 has 16 divisors (see below), whose sum is σ = 182755530720000. Its totient is φ = 177261319936848.

The previous prime is 180001020202093. The next prime is 180001020202147. The reversal of 180001020202121 is 121202020100081.

It is not a de Polignac number, because 180001020202121 - 2¹⁴ = 180001020185737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 180001020202093 and 180001020202102.

It is not an unprimeable number, because it can be changed into a prime (180001020252121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31624250 + ... + 36879468.

It is an arithmetic number, because the mean of its divisors is an integer number (11422220670000).

Almost surely, 2^{180001020202121} is an apocalyptic number.

It is an amenable number.

180001020202121 is a deficient number, since it is larger than the sum of its proper divisors (2754510517879).

180001020202121 is an equidigital number, since it uses as much as digits as its factorization.

180001020202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256628.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 180001020202121 in words is "one hundred eighty trillion, one billion, twenty million, two hundred two thousand, one hundred twenty-one".