102120134123 has 4 divisors (see below), whose sum is σ = 116708724720. Its totient is φ = 87531543528.

The previous prime is 102120134111. The next prime is 102120134153. The reversal of 102120134123 is 321431021201.

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 102120134123 - 2⁶ = 102120134059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102120134095 and 102120134104.

It is not an unprimeable number, because it can be changed into a prime (102120134153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7294295288 + ... + 7294295301.

It is an arithmetic number, because the mean of its divisors is an integer number (29177181180).

Almost surely, 2^102120134123 is an apocalyptic number.

102120134123 is a deficient number, since it is larger than the sum of its proper divisors (14588590597).

102120134123 is an equidigital number, since it uses as much as digits as its factorization.

102120134123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14588590596.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 102120134123 its reverse (321431021201), we get a palindrome (423551155324).

The spelling of 102120134123 in words is "one hundred two billion, one hundred twenty million, one hundred thirty-four thousand, one hundred twenty-three".