105121355 has 4 divisors (see below), whose sum is σ = 126145632. Its totient is φ = 84097080.

The previous prime is 105121351. The next prime is 105121381. The reversal of 105121355 is 553121501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553121501 = 1289 ⋅429109.

It is not a de Polignac number, because 105121355 - 2² = 105121351 is a prime.

It is a super-2 number, since 2×105121355² = 22100998554072050, which 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 105121355.

It is not an unprimeable number, because it can be changed into a prime (105121351) 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, 10512131 + ... + 10512140.

It is an arithmetic number, because the mean of its divisors is an integer number (31536408).

Almost surely, 2^105121355 is an apocalyptic number.

105121355 is a deficient number, since it is larger than the sum of its proper divisors (21024277).

105121355 is an equidigital number, since it uses as much as digits as its factorization.

105121355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21024276.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 105121355 is about 10252.8705736491. The cubic root of 105121355 is about 471.9510790890.

Adding to 105121355 its reverse (553121501), we get a palindrome (658242856).

The spelling of 105121355 in words is "one hundred five million, one hundred twenty-one thousand, three hundred fifty-five".