102144811 has 4 divisors (see below), whose sum is σ = 102166192. Its totient is φ = 102123432.

The previous prime is 102144799. The next prime is 102144821. The reversal of 102144811 is 118441201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118441201 = 191 ⋅620111.

It is a cyclic number.

It is not a de Polignac number, because 102144811 - 2⁹ = 102144299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102144821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121 + ... + 14293.

It is an arithmetic number, because the mean of its divisors is an integer number (25541548).

Almost surely, 2^102144811 is an apocalyptic number.

102144811 is a deficient number, since it is larger than the sum of its proper divisors (21381).

102144811 is an equidigital number, since it uses as much as digits as its factorization.

102144811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21380.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 102144811 is about 10106.6716083981. The cubic root of 102144811 is about 467.4538808919.

The spelling of 102144811 in words is "one hundred two million, one hundred forty-four thousand, eight hundred eleven".