102002123 has 4 divisors (see below), whose sum is σ = 102049920. Its totient is φ = 101954328.

The previous prime is 102002119. The next prime is 102002129. The reversal of 102002123 is 321200201.

It is a happy number.

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 102002123 - 2² = 102002119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102002129) 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, 20540 + ... + 25017.

It is an arithmetic number, because the mean of its divisors is an integer number (25512480).

Almost surely, 2^102002123 is an apocalyptic number.

102002123 is a deficient number, since it is larger than the sum of its proper divisors (47797).

102002123 is an equidigital number, since it uses as much as digits as its factorization.

102002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47796.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102002123 is about 10099.6100419769. The cubic root of 102002123 is about 467.2361144320.

Adding to 102002123 its reverse (321200201), we get a palindrome (423202324).

The spelling of 102002123 in words is "one hundred two million, two thousand, one hundred twenty-three".