3215200021 has 24 divisors (see below), whose sum is σ = 3753025920. Its totient is φ = 2742833280.

The previous prime is 3215200013. The next prime is 3215200057. The reversal of 3215200021 is 1200025123.

It is not a de Polignac number, because 3215200021 - 2³ = 3215200013 is a prime.

It is a super-2 number, since 2×3215200021² = 20675022350076800882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3215199968 and 3215200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3215200721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 752790 + ... + 757048.

It is an arithmetic number, because the mean of its divisors is an integer number (156376080).

Almost surely, 2^3215200021 is an apocalyptic number.

It is an amenable number.

3215200021 is a deficient number, since it is larger than the sum of its proper divisors (537825899).

3215200021 is a wasteful number, since it uses less digits than its factorization.

3215200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665 (or 4654 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 3215200021 is about 56702.7338053466. The cubic root of 3215200021 is about 1475.9421380717.

Adding to 3215200021 its reverse (1200025123), we get a palindrome (4415225144).

The spelling of 3215200021 in words is "three billion, two hundred fifteen million, two hundred thousand, twenty-one".