2021010220105 has 8 divisors (see below), whose sum is σ = 2425251149064. Its totient is φ = 1616782252800.

The previous prime is 2021010220051. The next prime is 2021010220127. The reversal of 2021010220105 is 5010220101202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 386161573561 + 1634848646544 = 621419^2 + 1278612^2 .

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

It is not a de Polignac number, because 2021010220105 - 2³⁵ = 1986650481737 is a prime.

It is a super-2 number, since 2×2021010220105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian 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, 2894016 + ... + 3523825.

It is an arithmetic number, because the mean of its divisors is an integer number (303156393633).

Almost surely, 2^{2021010220105} is an apocalyptic number.

It is an amenable number.

2021010220105 is a deficient number, since it is larger than the sum of its proper divisors (404240928959).

2021010220105 is an equidigital number, since it uses as much as digits as its factorization.

2021010220105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480827.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 2021010220105 its reverse (5010220101202), we get a palindrome (7031230321307).

The spelling of 2021010220105 in words is "two trillion, twenty-one billion, ten million, two hundred twenty thousand, one hundred five".