111211120212251 has 2 divisors, whose sum is σ = 111211120212252. Its totient is φ = 111211120212250.

The previous prime is 111211120212107. The next prime is 111211120212299. The reversal of 111211120212251 is 152212021112111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111211120212251 - 2¹⁴ = 111211120195867 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211120212551) 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 as a sum of consecutive naturals, namely, 55605560106125 + 55605560106126.

It is an arithmetic number, because the mean of its divisors is an integer number (55605560106126).

Almost surely, 2^{111211120212251} is an apocalyptic number.

111211120212251 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211120212251 is an equidigital number, since it uses as much as digits as its factorization.

111211120212251 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 23.

Adding to 111211120212251 its reverse (152212021112111), we get a palindrome (263423141324362).

The spelling of 111211120212251 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred twenty million, two hundred twelve thousand, two hundred fifty-one".