3822110821 has 4 divisors (see below), whose sum is σ = 3837970444. Its totient is φ = 3806251200.

The previous prime is 3822110791. The next prime is 3822110827. The reversal of 3822110821 is 1280112283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1280112283 = 4007 ⋅319469.

It can be written as a sum of positive squares in 2 ways, for example, as 2757720196 + 1064390625 = 52514^2 + 32625^2 .

It is a cyclic number.

It is not a de Polignac number, because 3822110821 - 2⁹ = 3822110309 is a prime.

It is a super-2 number, since 2×3822110821² = 29217062256010588082, which contains 22 as substring.

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 3822110821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3822110827) 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, 7929450 + ... + 7929931.

It is an arithmetic number, because the mean of its divisors is an integer number (959492611).

Almost surely, 2^3822110821 is an apocalyptic number.

It is an amenable number.

3822110821 is a deficient number, since it is larger than the sum of its proper divisors (15859623).

3822110821 is a wasteful number, since it uses less digits than its factorization.

3822110821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15859622.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 3822110821 is about 61823.2223440351. Note that the first 3 decimals coincide. The cubic root of 3822110821 is about 1563.5115424263.

The spelling of 3822110821 in words is "three billion, eight hundred twenty-two million, one hundred ten thousand, eight hundred twenty-one".