101126621 has 4 divisors (see below), whose sum is σ = 101321244. Its totient is φ = 100932000.

The previous prime is 101126617. The next prime is 101126633. The reversal of 101126621 is 126621101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126621101 = 89 ⋅1422709.

It can be written as a sum of positive squares in 2 ways, for example, as 15100996 + 86025625 = 3886^2 + 9275^2 .

It is a cyclic number.

It is not a de Polignac number, because 101126621 - 2² = 101126617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101126593 and 101126602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101126321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96530 + ... + 97571.

It is an arithmetic number, because the mean of its divisors is an integer number (25330311).

Almost surely, 2^101126621 is an apocalyptic number.

It is an amenable number.

101126621 is a deficient number, since it is larger than the sum of its proper divisors (194623).

101126621 is an equidigital number, since it uses as much as digits as its factorization.

101126621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194622.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 101126621 is about 10056.1732781411. The cubic root of 101126621 is about 465.8954817878.

Adding to 101126621 its reverse (126621101), we get a palindrome (227747722).

It can be divided in two parts, 101 and 126621, that multiplied together give a palindrome (12788721).

The spelling of 101126621 in words is "one hundred one million, one hundred twenty-six thousand, six hundred twenty-one".