10002123100020 has 48 divisors (see below), whose sum is σ = 29479941771840. Its totient is φ = 2526852151296.

The previous prime is 10002123100019. The next prime is 10002123100027. The reversal of 10002123100020 is 2000132120001.

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 = 10002123099969 and 10002123100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002123100027) 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, 4386894957 + ... + 4386897236.

It is an arithmetic number, because the mean of its divisors is an integer number (614165453580).

Almost surely, 2^{10002123100020} is an apocalyptic number.

10002123100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10002123100020 is an abundant number, since it is smaller than the sum of its proper divisors (19477818671820).

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

10002123100020 is a wasteful number, since it uses less digits than its factorization.

10002123100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8773792224 (or 8773792222 counting only the distinct ones).

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

Adding to 10002123100020 its reverse (2000132120001), we get a palindrome (12002255220021).

The spelling of 10002123100020 in words is "ten trillion, two billion, one hundred twenty-three million, one hundred thousand, twenty".