212201111251 has 2 divisors, whose sum is σ = 212201111252. Its totient is φ = 212201111250.

The previous prime is 212201111249. The next prime is 212201111303. The reversal of 212201111251 is 152111102212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212201111251 - 2¹ = 212201111249 is a prime.

Together with 212201111249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212201112251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100555625 + 106100555626.

It is an arithmetic number, because the mean of its divisors is an integer number (106100555626).

Almost surely, 2^212201111251 is an apocalyptic number.

212201111251 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201111251 is an equidigital number, since it uses as much as digits as its factorization.

212201111251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 212201111251 its reverse (152111102212), we get a palindrome (364312213463).

The spelling of 212201111251 in words is "two hundred twelve billion, two hundred one million, one hundred eleven thousand, two hundred fifty-one".