100136621 has 8 divisors (see below), whose sum is σ = 108437784. Its totient is φ = 91920960.

The previous prime is 100136611. The next prime is 100136633. The reversal of 100136621 is 126631001.

It can be written as a sum of positive squares in 4 ways, for example, as 3822025 + 96314596 = 1955^2 + 9814^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100136621 - 2¹⁸ = 99874477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100136593 and 100136602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100136611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18926 + ... + 23631.

It is an arithmetic number, because the mean of its divisors is an integer number (13554723).

Almost surely, 2^100136621 is an apocalyptic number.

It is an amenable number.

100136621 is a deficient number, since it is larger than the sum of its proper divisors (8301163).

100136621 is a wasteful number, since it uses less digits than its factorization.

100136621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42751.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 100136621 is about 10006.8287184302. The cubic root of 100136621 is about 464.3701666740.

Adding to 100136621 its reverse (126631001), we get a palindrome (226767622).

The spelling of 100136621 in words is "one hundred million, one hundred thirty-six thousand, six hundred twenty-one".