4109699250721 has 4 divisors (see below), whose sum is σ = 4109703326100. Its totient is φ = 4109695175344.

The previous prime is 4109699250719. The next prime is 4109699250781. The reversal of 4109699250721 is 1270529969014.

It is a happy number.

4109699250721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 2158827797025 + 1950871453696 = 1469295^2 + 1396736^2 .

It is a cyclic number.

It is not a de Polignac number, because 4109699250721 - 2¹ = 4109699250719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4109699250781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709695 + ... + 2953483.

It is an arithmetic number, because the mean of its divisors is an integer number (1027425831525).

Almost surely, 2^{4109699250721} is an apocalyptic number.

It is an amenable number.

4109699250721 is a deficient number, since it is larger than the sum of its proper divisors (4075379).

4109699250721 is a wasteful number, since it uses less digits than its factorization.

4109699250721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075378.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 4109699250721 in words is "four trillion, one hundred nine billion, six hundred ninety-nine million, two hundred fifty thousand, seven hundred twenty-one".