200221102122121 has 4 divisors (see below), whose sum is σ = 200258858322432. Its totient is φ = 200183345921812.

The previous prime is 200221102122049. The next prime is 200221102122131. The reversal of 200221102122121 is 121221201122002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200221102122121 - 2¹¹ = 200221102120073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200221102122131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18878092201 + ... + 18878102806.

It is an arithmetic number, because the mean of its divisors is an integer number (50064714580608).

Almost surely, 2^{200221102122121} is an apocalyptic number.

It is an amenable number.

200221102122121 is a deficient number, since it is larger than the sum of its proper divisors (37756200311).

200221102122121 is an equidigital number, since it uses as much as digits as its factorization.

200221102122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37756200310.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 200221102122121 its reverse (121221201122002), we get a palindrome (321442303244123).

The spelling of 200221102122121 in words is "two hundred trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, one hundred twenty-one".