102800111 has 2 divisors, whose sum is σ = 102800112. Its totient is φ = 102800110.

The previous prime is 102800083. The next prime is 102800129. The reversal of 102800111 is 111008201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102800111 - 2¹⁰ = 102799087 is a prime.

It is a super-2 number, since 2×102800111² = 21135725643224642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102800011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51400055 + 51400056.

It is an arithmetic number, because the mean of its divisors is an integer number (51400056).

Almost surely, 2^102800111 is an apocalyptic number.

102800111 is a deficient number, since it is larger than the sum of its proper divisors (1).

102800111 is an equidigital number, since it uses as much as digits as its factorization.

102800111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 102800111 is about 10139.0389584023. The cubic root of 102800111 is about 468.4513856084.

Adding to 102800111 its reverse (111008201), we get a palindrome (213808312).

The spelling of 102800111 in words is "one hundred two million, eight hundred thousand, one hundred eleven".