7106561105721 has 16 divisors (see below), whose sum is σ = 11813504176128. Its totient is φ = 3691720054800.

The previous prime is 7106561105717. The next prime is 7106561105753. The reversal of 7106561105721 is 1275011656017.

It is not a de Polignac number, because 7106561105721 - 2² = 7106561105717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7106561105771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15382166665 + ... + 15382167126.

It is an arithmetic number, because the mean of its divisors is an integer number (738344011008).

Almost surely, 2^{7106561105721} is an apocalyptic number.

It is an amenable number.

7106561105721 is a deficient number, since it is larger than the sum of its proper divisors (4706943070407).

7106561105721 is a wasteful number, since it uses less digits than its factorization.

7106561105721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30764333812.

The product of its (nonzero) digits is 88200, while the sum is 42.

The spelling of 7106561105721 in words is "seven trillion, one hundred six billion, five hundred sixty-one million, one hundred five thousand, seven hundred twenty-one".