102102178123 has 16 divisors (see below), whose sum is σ = 113994832896. Its totient is φ = 90660342240.

The previous prime is 102102178111. The next prime is 102102178147. The reversal of 102102178123 is 321871201201.

It is a cyclic number.

It is not a de Polignac number, because 102102178123 - 2⁵ = 102102178091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102102178091 and 102102178100.

It is not an unprimeable number, because it can be changed into a prime (102102178163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262665 + ... + 522682.

It is an arithmetic number, because the mean of its divisors is an integer number (7124677056).

Almost surely, 2^102102178123 is an apocalyptic number.

102102178123 is a deficient number, since it is larger than the sum of its proper divisors (11892654773).

102102178123 is a wasteful number, since it uses less digits than its factorization.

102102178123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785634.

The product of its (nonzero) digits is 1344, while the sum is 28.

Adding to 102102178123 its reverse (321871201201), we get a palindrome (423973379324).

The spelling of 102102178123 in words is "one hundred two billion, one hundred two million, one hundred seventy-eight thousand, one hundred twenty-three".