20010120123 has 16 divisors (see below), whose sum is σ = 32096433920. Its totient is φ = 10832546016.

The previous prime is 20010120041. The next prime is 20010120131. The reversal of 20010120123 is 32102101002.

It is not a de Polignac number, because 20010120123 - 2¹⁶ = 20010054587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010120099 and 20010120108.

It is not an unprimeable number, because it can be changed into a prime (20010120023) 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, 25074940 + ... + 25075737.

It is an arithmetic number, because the mean of its divisors is an integer number (2006027120).

Almost surely, 2^20010120123 is an apocalyptic number.

20010120123 is a deficient number, since it is larger than the sum of its proper divisors (12086313797).

20010120123 is a wasteful number, since it uses less digits than its factorization.

20010120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50150706.

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

Adding to 20010120123 its reverse (32102101002), we get a palindrome (52112221125).

The spelling of 20010120123 in words is "twenty billion, ten million, one hundred twenty thousand, one hundred twenty-three".