3213221100 has 72 divisors (see below), whose sum is σ = 9786248640. Its totient is φ = 811759680.

The previous prime is 3213221069. The next prime is 3213221101. The reversal of 3213221100 is 11223123.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 3213221100.

It is not an unprimeable number, because it can be changed into a prime (3213221101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276162 + ... + 287561.

It is an arithmetic number, because the mean of its divisors is an integer number (135920120).

Almost surely, 2^3213221100 is an apocalyptic number.

3213221100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3213221100 is an abundant number, since it is smaller than the sum of its proper divisors (6573027540).

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

3213221100 is a wasteful number, since it uses less digits than its factorization.

3213221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563759 (or 563752 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3213221100 is about 56685.2811583395. The cubic root of 3213221100 is about 1475.6392670930.

Adding to 3213221100 its reverse (11223123), we get a palindrome (3224444223).

The spelling of 3213221100 in words is "three billion, two hundred thirteen million, two hundred twenty-one thousand, one hundred".