3211221101220 has 96 divisors (see below), whose sum is σ = 10898689818240. Its totient is φ = 778477841280.

The previous prime is 3211221101201. The next prime is 3211221101243. The reversal of 3211221101220 is 221011221123.

3211221101220 is a `hidden beast` number, since 3 + 211 + 221 + 10 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3211221101193 and 3211221101202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270298867 + ... + 270310746.

It is an arithmetic number, because the mean of its divisors is an integer number (113528018940).

Almost surely, 2^{3211221101220} is an apocalyptic number.

3211221101220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3211221101220 is an abundant number, since it is smaller than the sum of its proper divisors (7687468717020).

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

3211221101220 is a wasteful number, since it uses less digits than its factorization.

3211221101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540609642 (or 540609634 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 3211221101220 its reverse (221011221123), we get a palindrome (3432232322343).

The spelling of 3211221101220 in words is "three trillion, two hundred eleven billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty".