120123011321 has 4 divisors (see below), whose sum is σ = 120123849600. Its totient is φ = 120122173044.

The previous prime is 120123011317. The next prime is 120123011353. The reversal of 120123011321 is 123110321021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 120123011321 - 2² = 120123011317 is a prime.

It is a super-3 number, since 3×120123011321³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120123011321.

It is not an unprimeable number, because it can be changed into a prime (120123011311) 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, 143981 + ... + 510858.

It is an arithmetic number, because the mean of its divisors is an integer number (30030962400).

Almost surely, 2^120123011321 is an apocalyptic number.

It is an amenable number.

120123011321 is a deficient number, since it is larger than the sum of its proper divisors (838279).

120123011321 is an equidigital number, since it uses as much as digits as its factorization.

120123011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838278.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 120123011321 its reverse (123110321021), we get a palindrome (243233332342).

The spelling of 120123011321 in words is "one hundred twenty billion, one hundred twenty-three million, eleven thousand, three hundred twenty-one".