103504661216621 has 12 divisors (see below), whose sum is σ = 124555222155420. Its totient is φ = 85659029971200.

The previous prime is 103504661216609. The next prime is 103504661216641. The reversal of 103504661216621 is 126612166405301.

It can be written as a sum of positive squares in 2 ways, for example, as 48094294350025 + 55410366866596 = 6935005^2 + 7443814^2 .

It is not a de Polignac number, because 103504661216621 - 2¹⁸ = 103504660954477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103504661216641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36419654180 + ... + 36419657021.

It is an arithmetic number, because the mean of its divisors is an integer number (10379601846285).

Almost surely, 2^{103504661216621} is an apocalyptic number.

It is an amenable number.

103504661216621 is a deficient number, since it is larger than the sum of its proper divisors (21050560938799).

103504661216621 is an equidigital number, since it uses as much as digits as its factorization.

103504661216621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72839311244 (or 72839311237 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 103504661216621 in words is "one hundred three trillion, five hundred four billion, six hundred sixty-one million, two hundred sixteen thousand, six hundred twenty-one".