102881111 has 2 divisors, whose sum is σ = 102881112. Its totient is φ = 102881110.

The previous prime is 102881071. The next prime is 102881117. The reversal of 102881111 is 111188201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102881111 - 2¹⁰ = 102880087 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102881117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51440555 + 51440556.

It is an arithmetic number, because the mean of its divisors is an integer number (51440556).

Almost surely, 2^102881111 is an apocalyptic number.

102881111 is a deficient number, since it is larger than the sum of its proper divisors (1).

102881111 is an equidigital number, since it uses as much as digits as its factorization.

102881111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 23.

The square root of 102881111 is about 10143.0326332907. The cubic root of 102881111 is about 468.5743900172.

The spelling of 102881111 in words is "one hundred two million, eight hundred eighty-one thousand, one hundred eleven".