200221110102121 has 4 divisors (see below), whose sum is σ = 200221138431700. Its totient is φ = 200221081772544.

The previous prime is 200221110102103. The next prime is 200221110102161. The reversal of 200221110102121 is 121201011122002.

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 100034302941225 + 100186807160896 = 10001715^2 + 10009336^2 .

It is a cyclic number.

It is not a de Polignac number, because 200221110102121 - 2²¹ = 200221108004969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200221110102095 and 200221110102104.

It is not an unprimeable number, because it can be changed into a prime (200221110102161) 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, 6110125 + ... + 20923093.

It is an arithmetic number, because the mean of its divisors is an integer number (50055284607925).

Almost surely, 2^{200221110102121} is an apocalyptic number.

It is an amenable number.

200221110102121 is a deficient number, since it is larger than the sum of its proper divisors (28329579).

200221110102121 is a wasteful number, since it uses less digits than its factorization.

200221110102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28329578.

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

Adding to 200221110102121 its reverse (121201011122002), we get a palindrome (321422121224123).

The spelling of 200221110102121 in words is "two hundred trillion, two hundred twenty-one billion, one hundred ten million, one hundred two thousand, one hundred twenty-one".