105515331121 has 4 divisors (see below), whose sum is σ = 105896253172. Its totient is φ = 105134409072.

The previous prime is 105515331113. The next prime is 105515331193. The reversal of 105515331121 is 121133515501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121133515501 = 23 ⋅5266674587.

It can be written as a sum of positive squares in 2 ways, for example, as 29029344400 + 76485986721 = 170380^2 + 276561^2 .

It is a cyclic number.

It is not a de Polignac number, because 105515331121 - 2³ = 105515331113 is a prime.

It is a super-2 number, since 2×105515331121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105515331121.

It is not an unprimeable number, because it can be changed into a prime (105515331221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190460610 + ... + 190461163.

It is an arithmetic number, because the mean of its divisors is an integer number (26474063293).

Almost surely, 2^105515331121 is an apocalyptic number.

It is an amenable number.

105515331121 is a deficient number, since it is larger than the sum of its proper divisors (380922051).

105515331121 is an equidigital number, since it uses as much as digits as its factorization.

105515331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380922050.

The product of its (nonzero) digits is 2250, while the sum is 28.

Adding to 105515331121 its reverse (121133515501), we get a palindrome (226648846622).

The spelling of 105515331121 in words is "one hundred five billion, five hundred fifteen million, three hundred thirty-one thousand, one hundred twenty-one".