2121015 has 32 divisors (see below), whose sum is σ = 3729600. Its totient is φ = 1022976.

The previous prime is 2121011. The next prime is 2121017. The reversal of 2121015 is 5101212.

2121015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2121015 - 2² = 2121011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14161 + ... + 14309.

It is an arithmetic number, because the mean of its divisors is an integer number (116550).

2^2121015 is an apocalyptic number.

2121015 is a deficient number, since it is larger than the sum of its proper divisors (1608585).

2121015 is a wasteful number, since it uses less digits than its factorization.

2121015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 2121015 is about 1456.3704885777. The cubic root of 2121015 is about 128.4836640904.

Adding to 2121015 its reverse (5101212), we get a palindrome (7222227).

The spelling of 2121015 in words is "two million, one hundred twenty-one thousand, fifteen".