120123001321 has 4 divisors (see below), whose sum is σ = 120156549444. Its totient is φ = 120089453200.

The previous prime is 120123001279. The next prime is 120123001331. The reversal of 120123001321 is 123100321021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123100321021 = 59 ⋅2086446119.

It can be written as a sum of positive squares in 2 ways, for example, as 112619976921 + 7503024400 = 335589^2 + 86620^2 .

It is a cyclic number.

It is not a de Polignac number, because 120123001321 - 2²⁵ = 120089446889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120123001295 and 120123001304.

It is not an unprimeable number, because it can be changed into a prime (120123001331) 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, 16768690 + ... + 16775851.

It is an arithmetic number, because the mean of its divisors is an integer number (30039137361).

Almost surely, 2^120123001321 is an apocalyptic number.

It is an amenable number.

120123001321 is a deficient number, since it is larger than the sum of its proper divisors (33548123).

120123001321 is an equidigital number, since it uses as much as digits as its factorization.

120123001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33548122.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 120123001321 its reverse (123100321021), we get a palindrome (243223322342).

The spelling of 120123001321 in words is "one hundred twenty billion, one hundred twenty-three million, one thousand, three hundred twenty-one".