105015240021 has 16 divisors (see below), whose sum is σ = 141332734400. Its totient is φ = 69354206208.

The previous prime is 105015240007. The next prime is 105015240041. The reversal of 105015240021 is 120042510501.

It is not a de Polignac number, because 105015240021 - 2⁶ = 105015239957 is a prime.

It is a super-2 number, since 2×105015240021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 105015240021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105015240041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1792230 + ... + 1849896.

It is an arithmetic number, because the mean of its divisors is an integer number (8833295900).

Almost surely, 2^105015240021 is an apocalyptic number.

It is an amenable number.

105015240021 is a deficient number, since it is larger than the sum of its proper divisors (36317494379).

105015240021 is a wasteful number, since it uses less digits than its factorization.

105015240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63348.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 105015240021 its reverse (120042510501), we get a palindrome (225057750522).

The spelling of 105015240021 in words is "one hundred five billion, fifteen million, two hundred forty thousand, twenty-one".