200121210227 has 2 divisors, whose sum is σ = 200121210228. Its totient is φ = 200121210226.

The previous prime is 200121210199. The next prime is 200121210229. The reversal of 200121210227 is 722012121002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121210227 is a prime.

Together with 200121210229, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 200121210199 and 200121210208.

It is not a weakly prime, because it can be changed into another prime (200121210229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060605113 + 100060605114.

It is an arithmetic number, because the mean of its divisors is an integer number (100060605114).

Almost surely, 2^200121210227 is an apocalyptic number.

200121210227 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121210227 is an equidigital number, since it uses as much as digits as its factorization.

200121210227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 200121210227 its reverse (722012121002), we get a palindrome (922133331229).

The spelling of 200121210227 in words is "two hundred billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-seven".