2013101021 has 4 divisors (see below), whose sum is σ = 2013321600. Its totient is φ = 2012880444.

The previous prime is 2013100997. The next prime is 2013101047. The reversal of 2013101021 is 1201013102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013101021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013100993 and 2013101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013101081) 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, 95981 + ... + 115058.

It is an arithmetic number, because the mean of its divisors is an integer number (503330400).

Almost surely, 2^2013101021 is an apocalyptic number.

It is an amenable number.

2013101021 is a deficient number, since it is larger than the sum of its proper divisors (220579).

2013101021 is an equidigital number, since it uses as much as digits as its factorization.

2013101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220578.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2013101021 is about 44867.5943304296. The cubic root of 2013101021 is about 1262.6661067723. Note that the first 3 decimals are identical.

Adding to 2013101021 its reverse (1201013102), we get a palindrome (3214114123).

The spelling of 2013101021 in words is "two billion, thirteen million, one hundred one thousand, twenty-one".