102811 has 2 divisors, whose sum is σ = 102812. Its totient is φ = 102810.

The previous prime is 102797. The next prime is 102829. The reversal of 102811 is 118201.

102811 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102811 - 2⁹ = 102299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102791 and 102800.

It is not a weakly prime, because it can be changed into another prime (102841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51405 + 51406.

It is an arithmetic number, because the mean of its divisors is an integer number (51406).

2¹⁰²⁸¹¹ is an apocalyptic number.

102811 is a deficient number, since it is larger than the sum of its proper divisors (1).

102811 is an equidigital number, since it uses as much as digits as its factorization.

102811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 102811 is about 320.6415444075. The cubic root of 102811 is about 46.8467925108.

The spelling of 102811 in words is "one hundred two thousand, eight hundred eleven".