105500222121 has 16 divisors (see below), whose sum is σ = 160812883328. Its totient is φ = 60266851200.

The previous prime is 105500222077. The next prime is 105500222129. The reversal of 105500222121 is 121222005501.

It is not a de Polignac number, because 105500222121 - 2⁹ = 105500221609 is a prime.

It is a super-2 number, since 2×105500222121² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105500222129) 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, 722860 + ... + 856461.

It is an arithmetic number, because the mean of its divisors is an integer number (10050805208).

Almost surely, 2^105500222121 is an apocalyptic number.

It is an amenable number.

105500222121 is a deficient number, since it is larger than the sum of its proper divisors (55312661207).

105500222121 is a wasteful number, since it uses less digits than its factorization.

105500222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582512.

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

Adding to 105500222121 its reverse (121222005501), we get a palindrome (226722227622).

The spelling of 105500222121 in words is "one hundred five billion, five hundred million, two hundred twenty-two thousand, one hundred twenty-one".