3213021220 has 48 divisors (see below), whose sum is σ = 7202563200. Its totient is φ = 1200407040.

The previous prime is 3213021193. The next prime is 3213021223. The reversal of 3213021220 is 221203123.

It is a junction number, because it is equal to n+sod(n) for n = 3213021194 and 3213021203.

It is not an unprimeable number, because it can be changed into a prime (3213021223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32565 + ... + 86524.

It is an arithmetic number, because the mean of its divisors is an integer number (150053400).

Almost surely, 2^3213021220 is an apocalyptic number.

It is an amenable number.

3213021220 is an abundant number, since it is smaller than the sum of its proper divisors (3989541980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3213021220 is a wasteful number, since it uses less digits than its factorization.

3213021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119188 (or 119186 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3213021220 is about 56683.5180630137. The cubic root of 3213021220 is about 1475.6086688362.

Adding to 3213021220 its reverse (221203123), we get a palindrome (3434224343).

The spelling of 3213021220 in words is "three billion, two hundred thirteen million, twenty-one thousand, two hundred twenty".