10082340721 has 4 divisors (see below), whose sum is σ = 10082586100. Its totient is φ = 10082095344.

The previous prime is 10082340701. The next prime is 10082340733. The reversal of 10082340721 is 12704328001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12704328001 = 23 ⋅552362087.

It can be written as a sum of positive squares in 2 ways, for example, as 352688400 + 9729652321 = 18780^2 + 98639^2 .

It is a cyclic number.

It is not a de Polignac number, because 10082340721 - 2¹³ = 10082332529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10082340721.

It is not an unprimeable number, because it can be changed into a prime (10082340701) 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, 44406 + ... + 148783.

It is an arithmetic number, because the mean of its divisors is an integer number (2520646525).

Almost surely, 2^10082340721 is an apocalyptic number.

It is an amenable number.

10082340721 is a deficient number, since it is larger than the sum of its proper divisors (245379).

10082340721 is an equidigital number, since it uses as much as digits as its factorization.

10082340721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245378.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 10082340721 its reverse (12704328001), we get a palindrome (22786668722).

The spelling of 10082340721 in words is "ten billion, eighty-two million, three hundred forty thousand, seven hundred twenty-one".