200210211202121 has 4 divisors (see below), whose sum is σ = 203987762356932. Its totient is φ = 196432660047312.

The previous prime is 200210211202117. The next prime is 200210211202163. The reversal of 200210211202121 is 121202112012002.

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 63072902004025 + 137137309198096 = 7941845^2 + 11710564^2 .

It is a cyclic number.

It is not a de Polignac number, because 200210211202121 - 2² = 200210211202117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200210211202121.

It is not an unprimeable number, because it can be changed into a prime (200210211202181) 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, 1888775577326 + ... + 1888775577431.

It is an arithmetic number, because the mean of its divisors is an integer number (50996940589233).

Almost surely, 2^{200210211202121} is an apocalyptic number.

It is an amenable number.

200210211202121 is a deficient number, since it is larger than the sum of its proper divisors (3777551154811).

200210211202121 is an equidigital number, since it uses as much as digits as its factorization.

200210211202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777551154810.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200210211202121 its reverse (121202112012002), we get a palindrome (321412323214123).

The spelling of 200210211202121 in words is "two hundred trillion, two hundred ten billion, two hundred eleven million, two hundred two thousand, one hundred twenty-one".