2013121345 has 48 divisors (see below), whose sum is σ = 2731155840. Its totient is φ = 1417844736.

The previous prime is 2013121337. The next prime is 2013121379. The reversal of 2013121345 is 5431213102.

It is a happy number.

It is not a de Polignac number, because 2013121345 - 2³ = 2013121337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2990929 + ... + 2991601.

It is an arithmetic number, because the mean of its divisors is an integer number (56899080).

Almost surely, 2^2013121345 is an apocalyptic number.

It is an amenable number.

2013121345 is a deficient number, since it is larger than the sum of its proper divisors (718034495).

2013121345 is a wasteful number, since it uses less digits than its factorization.

2013121345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2013121345 is about 44867.8208184886. The cubic root of 2013121345 is about 1262.6703559944.

Adding to 2013121345 its reverse (5431213102), we get a palindrome (7444334447).

The spelling of 2013121345 in words is "two billion, thirteen million, one hundred twenty-one thousand, three hundred forty-five".