200121110212021 has 16 divisors (see below), whose sum is σ = 213119764070400. Its totient is φ = 187380405012528.

The previous prime is 200121110212013. The next prime is 200121110212031. The reversal of 200121110212021 is 120212011121002.

It is a cyclic number.

It is not a de Polignac number, because 200121110212021 - 2³ = 200121110212013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121110211986 and 200121110212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121110212031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157035661 + ... + 158304898.

It is an arithmetic number, because the mean of its divisors is an integer number (13319985254400).

Almost surely, 2^{200121110212021} is an apocalyptic number.

It is an amenable number.

200121110212021 is a deficient number, since it is larger than the sum of its proper divisors (12998653858379).

200121110212021 is a wasteful number, since it uses less digits than its factorization.

200121110212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315340968.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200121110212021 its reverse (120212011121002), we get a palindrome (320333121333023).

The spelling of 200121110212021 in words is "two hundred trillion, one hundred twenty-one billion, one hundred ten million, two hundred twelve thousand, twenty-one".