20122013123 has 4 divisors (see below), whose sum is σ = 20148180360. Its totient is φ = 20095845888.

The previous prime is 20122013117. The next prime is 20122013159. The reversal of 20122013123 is 32131022102.

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 20122013123 - 2²⁰ = 20120964547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122013423) 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, 13082465 + ... + 13084002.

It is an arithmetic number, because the mean of its divisors is an integer number (5037045090).

Almost surely, 2^20122013123 is an apocalyptic number.

20122013123 is a deficient number, since it is larger than the sum of its proper divisors (26167237).

20122013123 is an equidigital number, since it uses as much as digits as its factorization.

20122013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26167236.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20122013123 its reverse (32131022102), we get a palindrome (52253035225).

The spelling of 20122013123 in words is "twenty billion, one hundred twenty-two million, thirteen thousand, one hundred twenty-three".