100123102020 has 24 divisors (see below), whose sum is σ = 280344685824. Its totient is φ = 26699493856.

The previous prime is 100123101989. The next prime is 100123102033. The reversal of 100123102020 is 20201321001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100123101987 and 100123102005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834359124 + ... + 834359243.

It is an arithmetic number, because the mean of its divisors is an integer number (11681028576).

Almost surely, 2^100123102020 is an apocalyptic number.

100123102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100123102020 is an abundant number, since it is smaller than the sum of its proper divisors (180221583804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100123102020 is a wasteful number, since it uses less digits than its factorization.

100123102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668718379 (or 1668718377 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 100123102020 its reverse (20201321001), we get a palindrome (120324423021).

The spelling of 100123102020 in words is "one hundred billion, one hundred twenty-three million, one hundred two thousand, twenty".