221200110012251 has 2 divisors, whose sum is σ = 221200110012252. Its totient is φ = 221200110012250.

The previous prime is 221200110012181. The next prime is 221200110012253. The reversal of 221200110012251 is 152210011002122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200110012251 is a prime.

Together with 221200110012253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221200110012253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600055006125 + 110600055006126.

It is an arithmetic number, because the mean of its divisors is an integer number (110600055006126).

Almost surely, 2^{221200110012251} is an apocalyptic number.

221200110012251 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200110012251 is an equidigital number, since it uses as much as digits as its factorization.

221200110012251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 221200110012251 its reverse (152210011002122), we get a palindrome (373410121014373).

The spelling of 221200110012251 in words is "two hundred twenty-one trillion, two hundred billion, one hundred ten million, twelve thousand, two hundred fifty-one".