20200200210121 has 4 divisors (see below), whose sum is σ = 20200251781252. Its totient is φ = 20200148638992.

The previous prime is 20200200209951. The next prime is 20200200210131. The reversal of 20200200210121 is 12101200200202.

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 1238190307600 + 18962009902521 = 1112740^2 + 4354539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200200210121 - 2¹⁷ = 20200200079049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200200210131) 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, 25193490 + ... + 25982923.

It is an arithmetic number, because the mean of its divisors is an integer number (5050062945313).

Almost surely, 2^{20200200210121} is an apocalyptic number.

It is an amenable number.

20200200210121 is a deficient number, since it is larger than the sum of its proper divisors (51571131).

20200200210121 is an equidigital number, since it uses as much as digits as its factorization.

20200200210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51571130.

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

Adding to 20200200210121 its reverse (12101200200202), we get a palindrome (32301400410323).

The spelling of 20200200210121 in words is "twenty trillion, two hundred billion, two hundred million, two hundred ten thousand, one hundred twenty-one".