20200022100121 has 4 divisors (see below), whose sum is σ = 20200031291700. Its totient is φ = 20200012908544.

The previous prime is 20200022100109. The next prime is 20200022100187. The reversal of 20200022100121 is 12100122000202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13153758029721 + 7046264070400 = 3626811^2 + 2654480^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200022100121 - 2¹³ = 20200022091929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200022100421) 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, 858165 + ... + 6413773.

It is an arithmetic number, because the mean of its divisors is an integer number (5050007822925).

Almost surely, 2^{20200022100121} is an apocalyptic number.

It is an amenable number.

20200022100121 is a deficient number, since it is larger than the sum of its proper divisors (9191579).

20200022100121 is an equidigital number, since it uses as much as digits as its factorization.

20200022100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9191578.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20200022100121 its reverse (12100122000202), we get a palindrome (32300144100323).

The spelling of 20200022100121 in words is "twenty trillion, two hundred billion, twenty-two million, one hundred thousand, one hundred twenty-one".