2013201021 has 16 divisors (see below), whose sum is σ = 2896713344. Its totient is φ = 1236337344.

The previous prime is 2013200999. The next prime is 2013201037. The reversal of 2013201021 is 1201023102.

It is not a de Polignac number, because 2013201021 - 2⁶ = 2013200957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013200988 and 2013201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013202021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34006 + ... + 71991.

It is an arithmetic number, because the mean of its divisors is an integer number (181044584).

Almost surely, 2^2013201021 is an apocalyptic number.

It is an amenable number.

2013201021 is a deficient number, since it is larger than the sum of its proper divisors (883512323).

2013201021 is a wasteful number, since it uses less digits than its factorization.

2013201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106500.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2013201021 is about 44868.7087066254. The cubic root of 2013201021 is about 1262.6870139066.

Adding to 2013201021 its reverse (1201023102), we get a palindrome (3214224123).

The spelling of 2013201021 in words is "two billion, thirteen million, two hundred one thousand, twenty-one".