10970821 has 4 divisors (see below), whose sum is σ = 11238444. Its totient is φ = 10703200.

The previous prime is 10970819. The next prime is 10970851. The reversal of 10970821 is 12807901.

10970821 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 an emirpimes, since its reverse is a distinct semiprime: 12807901 = 89 ⋅143909.

It can be written as a sum of positive squares in 2 ways, for example, as 408321 + 10562500 = 639^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 10970821 - 2¹ = 10970819 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 10970821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10970851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133750 + ... + 133831.

It is an arithmetic number, because the mean of its divisors is an integer number (2809611).

Almost surely, 2^10970821 is an apocalyptic number.

It is an amenable number.

10970821 is a deficient number, since it is larger than the sum of its proper divisors (267623).

10970821 is an equidigital number, since it uses as much as digits as its factorization.

10970821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267622.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 10970821 is about 3312.2229695478. Note that the first 3 decimals coincide. The cubic root of 10970821 is about 222.2011879072.

The spelling of 10970821 in words is "ten million, nine hundred seventy thousand, eight hundred twenty-one".