2101704440021 has 8 divisors (see below), whose sum is σ = 2215588306080. Its totient is φ = 1988147358288.

The previous prime is 2101704439993. The next prime is 2101704440047. The reversal of 2101704440021 is 1200444071012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101704440021 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 (2101704443021) 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 7 ways as a sum of consecutive naturals, for example, 81682871 + ... + 81708596.

It is an arithmetic number, because the mean of its divisors is an integer number (276948538260).

Almost surely, 2^{2101704440021} is an apocalyptic number.

It is an amenable number.

2101704440021 is a deficient number, since it is larger than the sum of its proper divisors (113883866059).

2101704440021 is a wasteful number, since it uses less digits than its factorization.

2101704440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163392163.

The product of its (nonzero) digits is 1792, while the sum is 26.

The spelling of 2101704440021 in words is "two trillion, one hundred one billion, seven hundred four million, four hundred forty thousand, twenty-one".