200201021002121 has 4 divisors (see below), whose sum is σ = 203978398756932. Its totient is φ = 196423643247312.

The previous prime is 200201021002079. The next prime is 200201021002127. The reversal of 200201021002121 is 121200120102002.

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 178148041478521 + 22052979523600 = 13347211^2 + 4696060^2 .

It is a cyclic number.

It is not a de Polignac number, because 200201021002121 - 2¹⁴ = 200201020985737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200201021002096 and 200201021002105.

It is not an unprimeable number, because it can be changed into a prime (200201021002127) 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, 1888688877326 + ... + 1888688877431.

It is an arithmetic number, because the mean of its divisors is an integer number (50994599689233).

Almost surely, 2^{200201021002121} is an apocalyptic number.

It is an amenable number.

200201021002121 is a deficient number, since it is larger than the sum of its proper divisors (3777377754811).

200201021002121 is an equidigital number, since it uses as much as digits as its factorization.

200201021002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777377754810.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200201021002121 its reverse (121200120102002), we get a palindrome (321401141104123).

The spelling of 200201021002121 in words is "two hundred trillion, two hundred one billion, twenty-one million, two thousand, one hundred twenty-one".