102111212111 has 2 divisors, whose sum is σ = 102111212112. Its totient is φ = 102111212110.

The previous prime is 102111212087. The next prime is 102111212123. The reversal of 102111212111 is 111212111201.

It is a strong prime.

It is an emirp because it is prime and its reverse (111212111201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102111212111 - 2¹⁴ = 102111195727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102111212141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055606055 + 51055606056.

It is an arithmetic number, because the mean of its divisors is an integer number (51055606056).

Almost surely, 2^102111212111 is an apocalyptic number.

102111212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111212111 is an equidigital number, since it uses as much as digits as its factorization.

102111212111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 102111212111 its reverse (111212111201), we get a palindrome (213323323312).

The spelling of 102111212111 in words is "one hundred two billion, one hundred eleven million, two hundred twelve thousand, one hundred eleven".