251340212111 has 2 divisors, whose sum is σ = 251340212112. Its totient is φ = 251340212110.

The previous prime is 251340212099. The next prime is 251340212173. The reversal of 251340212111 is 111212043152.

251340212111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251340212111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251340212191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125670106055 + 125670106056.

It is an arithmetic number, because the mean of its divisors is an integer number (125670106056).

Almost surely, 2^251340212111 is an apocalyptic number.

251340212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

251340212111 is an equidigital number, since it uses as much as digits as its factorization.

251340212111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 251340212111 its reverse (111212043152), we get a palindrome (362552255263).

The spelling of 251340212111 in words is "two hundred fifty-one billion, three hundred forty million, two hundred twelve thousand, one hundred eleven".