105621101 has 4 divisors (see below), whose sum is σ = 105873600. Its totient is φ = 105368604.

The previous prime is 105621097. The next prime is 105621121. The reversal of 105621101 is 101126501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101126501 = 7 ⋅14446643.

It is a cyclic number.

It is not a de Polignac number, because 105621101 - 2² = 105621097 is a prime.

It is a super-2 number, since 2×105621101² = 22311633952904402, 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 105621101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105621121) 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, 125621 + ... + 126458.

It is an arithmetic number, because the mean of its divisors is an integer number (26468400).

Almost surely, 2^105621101 is an apocalyptic number.

It is an amenable number.

105621101 is a deficient number, since it is larger than the sum of its proper divisors (252499).

105621101 is an equidigital number, since it uses as much as digits as its factorization.

105621101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252498.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 105621101 is about 10277.2127057875. The cubic root of 105621101 is about 472.6977808289.

Adding to 105621101 its reverse (101126501), we get a palindrome (206747602).

The spelling of 105621101 in words is "one hundred five million, six hundred twenty-one thousand, one hundred one".