100621441430021 has 8 divisors (see below), whose sum is σ = 106599902799960. Its totient is φ = 94649597065728.

The previous prime is 100621441430011. The next prime is 100621441430063. The reversal of 100621441430021 is 120034144126001.

It can be written as a sum of positive squares in 4 ways, for example, as 26887190901796 + 73734250528225 = 5185286^2 + 8586865^2 .

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 100621441430021 - 2²² = 100621437235717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100621441430011) 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, 1654220096 + ... + 1654280921.

It is an arithmetic number, because the mean of its divisors is an integer number (13324987849995).

Almost surely, 2^{100621441430021} is an apocalyptic number.

It is an amenable number.

100621441430021 is a deficient number, since it is larger than the sum of its proper divisors (5978461369939).

100621441430021 is a wasteful number, since it uses less digits than its factorization.

100621441430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308502823.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 100621441430021 its reverse (120034144126001), we get a palindrome (220655585556022).

The spelling of 100621441430021 in words is "one hundred trillion, six hundred twenty-one billion, four hundred forty-one million, four hundred thirty thousand, twenty-one".