20123120223 has 20 divisors (see below), whose sum is σ = 30067881448. Its totient is φ = 13412103120.

The previous prime is 20123120219. The next prime is 20123120231. The reversal of 20123120223 is 32202132102.

It is not a de Polignac number, because 20123120223 - 2² = 20123120219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123120196 and 20123120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123120273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 324933 + ... + 381873.

Almost surely, 2^20123120223 is an apocalyptic number.

20123120223 is a deficient number, since it is larger than the sum of its proper divisors (9944761225).

20123120223 is an equidigital number, since it uses as much as digits as its factorization.

20123120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61316 (or 61307 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20123120223 its reverse (32202132102), we get a palindrome (52325252325).

The spelling of 20123120223 in words is "twenty billion, one hundred twenty-three million, one hundred twenty thousand, two hundred twenty-three".