2013123331 has 4 divisors (see below), whose sum is σ = 2013468912. Its totient is φ = 2012777752.

The previous prime is 2013123319. The next prime is 2013123337. The reversal of 2013123331 is 1333213102.

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 2013123331 - 2²³ = 2004734723 is a prime.

It is a super-2 number, since 2×2013123331² = 8105331091633071122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013123299 and 2013123308.

It is not an unprimeable number, because it can be changed into a prime (2013123337) 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, 163900 + ... + 175753.

It is an arithmetic number, because the mean of its divisors is an integer number (503367228).

Almost surely, 2^2013123331 is an apocalyptic number.

2013123331 is a deficient number, since it is larger than the sum of its proper divisors (345581).

2013123331 is an equidigital number, since it uses as much as digits as its factorization.

2013123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345580.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 2013123331 is about 44867.8429501575. The cubic root of 2013123331 is about 1262.6707712140.

Adding to 2013123331 its reverse (1333213102), we get a palindrome (3346336433).

The spelling of 2013123331 in words is "two billion, thirteen million, one hundred twenty-three thousand, three hundred thirty-one".