2121020015 has 8 divisors (see below), whose sum is σ = 2565265920. Its totient is φ = 1683454752.

The previous prime is 2121019997. The next prime is 2121020039. The reversal of 2121020015 is 5100201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121020015 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1669460 + ... + 1670729.

It is an arithmetic number, because the mean of its divisors is an integer number (320658240).

Almost surely, 2^2121020015 is an apocalyptic number.

2121020015 is a deficient number, since it is larger than the sum of its proper divisors (444245905).

2121020015 is a wasteful number, since it uses less digits than its factorization.

2121020015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340321.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2121020015 is about 46054.5330559327. The cubic root of 2121020015 is about 1284.8376535401.

Adding to 2121020015 its reverse (5100201212), we get a palindrome (7221221227).

The spelling of 2121020015 in words is "two billion, one hundred twenty-one million, twenty thousand, fifteen".