2120321123 has 4 divisors (see below), whose sum is σ = 2122546968. Its totient is φ = 2118095280.

The previous prime is 2120321087. The next prime is 2120321197. The reversal of 2120321123 is 3211230212.

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 2120321123 - 2¹⁰ = 2120320099 is a prime.

It is a super-2 number, since 2×2120321123² = 8991523329279962258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120321323) 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, 1111493 + ... + 1113398.

It is an arithmetic number, because the mean of its divisors is an integer number (530636742).

Almost surely, 2^2120321123 is an apocalyptic number.

2120321123 is a deficient number, since it is larger than the sum of its proper divisors (2225845).

2120321123 is an equidigital number, since it uses as much as digits as its factorization.

2120321123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225844.

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

The square root of 2120321123 is about 46046.9447737849. The cubic root of 2120321123 is about 1284.6965168233.

Adding to 2120321123 its reverse (3211230212), we get a palindrome (5331551335).

The spelling of 2120321123 in words is "two billion, one hundred twenty million, three hundred twenty-one thousand, one hundred twenty-three".