102020110123 has 4 divisors (see below), whose sum is σ = 102020758480. Its totient is φ = 102019461768.

The previous prime is 102020110091. The next prime is 102020110147. The reversal of 102020110123 is 321011020201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 321011020201 = 61 ⋅5262475741.

It is a cyclic number.

It is not a de Polignac number, because 102020110123 - 2⁵ = 102020110091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102020110723) 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, 78961 + ... + 458557.

It is an arithmetic number, because the mean of its divisors is an integer number (25505189620).

Almost surely, 2^102020110123 is an apocalyptic number.

102020110123 is a deficient number, since it is larger than the sum of its proper divisors (648357).

102020110123 is an equidigital number, since it uses as much as digits as its factorization.

102020110123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648356.

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

Adding to 102020110123 its reverse (321011020201), we get a palindrome (423031130324).

The spelling of 102020110123 in words is "one hundred two billion, twenty million, one hundred ten thousand, one hundred twenty-three".