20122031123 has 4 divisors (see below), whose sum is σ = 20665869840. Its totient is φ = 19578192408.

The previous prime is 20122031107. The next prime is 20122031173. The reversal of 20122031123 is 32113022102.

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 20122031123 - 2⁴ = 20122031107 is a prime.

It is a super-2 number, since 2×20122031123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122031173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271919303 + ... + 271919376.

It is an arithmetic number, because the mean of its divisors is an integer number (5166467460).

Almost surely, 2^20122031123 is an apocalyptic number.

20122031123 is a deficient number, since it is larger than the sum of its proper divisors (543838717).

20122031123 is an equidigital number, since it uses as much as digits as its factorization.

20122031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543838716.

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

Adding to 20122031123 its reverse (32113022102), we get a palindrome (52235053225).

The spelling of 20122031123 in words is "twenty billion, one hundred twenty-two million, thirty-one thousand, one hundred twenty-three".