2013121 has 16 divisors (see below), whose sum is σ = 2344320. Its totient is φ = 1710720.

The previous prime is 2013119. The next prime is 2013127. The reversal of 2013121 is 1213102.

It is not a de Polignac number, because 2013121 - 2¹ = 2013119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2013098 and 2013107.

It is not an unprimeable number, because it can be changed into a prime (2013127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18415 + ... + 18523.

It is an arithmetic number, because the mean of its divisors is an integer number (146520).

2^2013121 is an apocalyptic number.

It is an amenable number.

2013121 is a deficient number, since it is larger than the sum of its proper divisors (331199).

2013121 is a wasteful number, since it uses less digits than its factorization.

2013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2013121 is about 1418.8449527697. The cubic root of 2013121 is about 126.2670283864.

Adding to 2013121 its reverse (1213102), we get a palindrome (3226223).

The spelling of 2013121 in words is "two million, thirteen thousand, one hundred twenty-one".