102011143 has 4 divisors (see below), whose sum is σ = 109858168. Its totient is φ = 94164120.

The previous prime is 102011113. The next prime is 102011191. The reversal of 102011143 is 341110201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102011143 - 2⁹ = 102010631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 7847011 = 102011143 / (1 + 0 + 2 + 0 + 1 + 1 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011113) 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, 3923493 + ... + 3923518.

It is an arithmetic number, because the mean of its divisors is an integer number (27464542).

Almost surely, 2^102011143 is an apocalyptic number.

102011143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

102011143 is a deficient number, since it is larger than the sum of its proper divisors (7847025).

102011143 is an equidigital number, since it uses as much as digits as its factorization.

102011143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7847024.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102011143 is about 10100.0565839999. The cubic root of 102011143 is about 467.2498865163.

Adding to 102011143 its reverse (341110201), we get a palindrome (443121344).

The spelling of 102011143 in words is "one hundred two million, eleven thousand, one hundred forty-three".