105504214121 has 16 divisors (see below), whose sum is σ = 112648881600. Its totient is φ = 98644865088.

The previous prime is 105504214117. The next prime is 105504214159. The reversal of 105504214121 is 121412405501.

It is a happy number.

It is not a de Polignac number, because 105504214121 - 2² = 105504214117 is a prime.

It is a super-2 number, since 2×105504214121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105504210121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345530 + ... + 574803.

It is an arithmetic number, because the mean of its divisors is an integer number (7040555100).

Almost surely, 2^105504214121 is an apocalyptic number.

It is an amenable number.

105504214121 is a deficient number, since it is larger than the sum of its proper divisors (7144667479).

105504214121 is an equidigital number, since it uses as much as digits as its factorization.

105504214121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920488.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 105504214121 its reverse (121412405501), we get a palindrome (226916619622).

The spelling of 105504214121 in words is "one hundred five billion, five hundred four million, two hundred fourteen thousand, one hundred twenty-one".