2013123020021 has 12 divisors (see below), whose sum is σ = 2217029624352. Its totient is φ = 1824248770344.

The previous prime is 2013123019993. The next prime is 2013123020033. The reversal of 2013123020021 is 1200203213102.

It is not a de Polignac number, because 2013123020021 - 2¹⁴ = 2013123003637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013123020081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121220351 + ... + 121236956.

It is an arithmetic number, because the mean of its divisors is an integer number (184752468696).

Almost surely, 2^{2013123020021} is an apocalyptic number.

It is an amenable number.

2013123020021 is a deficient number, since it is larger than the sum of its proper divisors (203906604331).

2013123020021 is a wasteful number, since it uses less digits than its factorization.

2013123020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242457368 (or 242457349 counting only the distinct ones).

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

Adding to 2013123020021 its reverse (1200203213102), we get a palindrome (3213326233123).

The spelling of 2013123020021 in words is "two trillion, thirteen billion, one hundred twenty-three million, twenty thousand, twenty-one".