2021064120105 has 32 divisors (see below), whose sum is σ = 3468121971840. Its totient is φ = 1001901888000.

The previous prime is 2021064120083. The next prime is 2021064120157. The reversal of 2021064120105 is 5010214601202.

It is not a de Polignac number, because 2021064120105 - 2¹² = 2021064116009 is a prime.

It is a super-2 number, since 2×2021064120105² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66885396 + ... + 66915605.

It is an arithmetic number, because the mean of its divisors is an integer number (108378811620).

Almost surely, 2^{2021064120105} is an apocalyptic number.

It is an amenable number.

2021064120105 is a deficient number, since it is larger than the sum of its proper divisors (1447057851735).

2021064120105 is a wasteful number, since it uses less digits than its factorization.

2021064120105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133801081.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 2021064120105 its reverse (5010214601202), we get a palindrome (7031278721307).

The spelling of 2021064120105 in words is "two trillion, twenty-one billion, sixty-four million, one hundred twenty thousand, one hundred five".