9100672100021 has 4 divisors (see below), whose sum is σ = 9100681649100. Its totient is φ = 9100662550944.

The previous prime is 9100672099979. The next prime is 9100672100041. The reversal of 9100672100021 is 1200012760019.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2210309597521 + 6890362502500 = 1486711^2 + 2624950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9100672100021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9100672100041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3163856 + ... + 5311433.

It is an arithmetic number, because the mean of its divisors is an integer number (2275170412275).

Almost surely, 2^{9100672100021} is an apocalyptic number.

It is an amenable number.

9100672100021 is a deficient number, since it is larger than the sum of its proper divisors (9549079).

9100672100021 is a wasteful number, since it uses less digits than its factorization.

9100672100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9549078.

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 9100672100021 in words is "nine trillion, one hundred billion, six hundred seventy-two million, one hundred thousand, twenty-one".