20010100000123 has 4 divisors (see below), whose sum is σ = 20010888103968. Its totient is φ = 20009311896280.

The previous prime is 20010100000073. The next prime is 20010100000139. The reversal of 20010100000123 is 32100000101002.

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 20010100000123 - 2²⁹ = 20009563129211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010100004123) 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, 394013836 + ... + 394064617.

It is an arithmetic number, because the mean of its divisors is an integer number (5002722025992).

Almost surely, 2^{20010100000123} is an apocalyptic number.

20010100000123 is a deficient number, since it is larger than the sum of its proper divisors (788103845).

20010100000123 is an equidigital number, since it uses as much as digits as its factorization.

20010100000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788103844.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20010100000123 its reverse (32100000101002), we get a palindrome (52110100101125).

The spelling of 20010100000123 in words is "twenty trillion, ten billion, one hundred million, one hundred twenty-three", and thus it is an aban number.