2021010065 has 8 divisors (see below), whose sum is σ = 2567871720. Its totient is φ = 1521701632.

The previous prime is 2021010059. The next prime is 2021010067. The reversal of 2021010065 is 5600101202.

It can be written as a sum of positive squares in 4 ways, for example, as 152004241 + 1869005824 = 12329^2 + 43232^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2021010065 - 2²⁴ = 2004232849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (2021010067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11888210 + ... + 11888379.

It is an arithmetic number, because the mean of its divisors is an integer number (320983965).

Almost surely, 2^2021010065 is an apocalyptic number.

It is an amenable number.

2021010065 is a deficient number, since it is larger than the sum of its proper divisors (546861655).

2021010065 is a wasteful number, since it uses less digits than its factorization.

2021010065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23776611.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2021010065 is about 44955.6455297886. The cubic root of 2021010065 is about 1264.3175277908.

Adding to 2021010065 its reverse (5600101202), we get a palindrome (7621111267).

The spelling of 2021010065 in words is "two billion, twenty-one million, ten thousand, sixty-five".