105108568605421 has 4 divisors (see below), whose sum is σ = 105149324160000. Its totient is φ = 105067813050844.

The previous prime is 105108568605407. The next prime is 105108568605493. The reversal of 105108568605421 is 124506865801501.

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 105108568605421 - 2¹³ = 105108568597229 is a prime.

It is a super-2 number, since 2×105108568605421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105108568695421) 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, 20377773421 + ... + 20377778578.

It is an arithmetic number, because the mean of its divisors is an integer number (26287331040000).

Almost surely, 2^{105108568605421} is an apocalyptic number.

It is an amenable number.

105108568605421 is a deficient number, since it is larger than the sum of its proper divisors (40755554579).

105108568605421 is an equidigital number, since it uses as much as digits as its factorization.

105108568605421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40755554578.

The product of its (nonzero) digits is 2304000, while the sum is 52.

The spelling of 105108568605421 in words is "one hundred five trillion, one hundred eight billion, five hundred sixty-eight million, six hundred five thousand, four hundred twenty-one".