105140200121 has 4 divisors (see below), whose sum is σ = 114698400144. Its totient is φ = 95582000100.

The previous prime is 105140200103. The next prime is 105140200141. The reversal of 105140200121 is 121002041501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 105140200121 - 2¹⁴ = 105140183737 is a prime.

It is a super-2 number, since 2×105140200121² (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 105140200121.

It is not an unprimeable number, because it can be changed into a prime (105140200141) 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, 4779099995 + ... + 4779100016.

It is an arithmetic number, because the mean of its divisors is an integer number (28674600036).

Almost surely, 2^105140200121 is an apocalyptic number.

105140200121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

105140200121 is a deficient number, since it is larger than the sum of its proper divisors (9558200023).

105140200121 is an equidigital number, since it uses as much as digits as its factorization.

105140200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9558200022.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 105140200121 its reverse (121002041501), we get a palindrome (226142241622).

The spelling of 105140200121 in words is "one hundred five billion, one hundred forty million, two hundred thousand, one hundred twenty-one".