20123023311321 has 80 divisors (see below), whose sum is σ = 31520244571200. Its totient is φ = 11418469824384.

The previous prime is 20123023311317. The next prime is 20123023311329. The reversal of 20123023311321 is 12311332032102.

It is not a de Polignac number, because 20123023311321 - 2² = 20123023311317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20123023311291 and 20123023311300.

It is not an unprimeable number, because it can be changed into a prime (20123023311329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 594828435 + ... + 594862263.

It is an arithmetic number, because the mean of its divisors is an integer number (394003057140).

Almost surely, 2^{20123023311321} is an apocalyptic number.

20123023311321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20123023311321 is a deficient number, since it is larger than the sum of its proper divisors (11397221259879).

20123023311321 is an equidigital number, since it uses as much as digits as its factorization.

20123023311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34436 (or 34415 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20123023311321 its reverse (12311332032102), we get a palindrome (32434355343423).

The spelling of 20123023311321 in words is "twenty trillion, one hundred twenty-three billion, twenty-three million, three hundred eleven thousand, three hundred twenty-one".