13222031220 has 96 divisors (see below), whose sum is σ = 43300252800. Its totient is φ = 3340300032.

The previous prime is 13222031203. The next prime is 13222031267. The reversal of 13222031220 is 2213022231.

13222031220 is a `hidden beast` number, since 132 + 220 + 312 + 2 + 0 = 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 = 13222031193 and 13222031202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634089 + ... + 654608.

It is an arithmetic number, because the mean of its divisors is an integer number (451044300).

Almost surely, 2^13222031220 is an apocalyptic number.

13222031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13222031220 is an abundant number, since it is smaller than the sum of its proper divisors (30078221580).

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

13222031220 is a wasteful number, since it uses less digits than its factorization.

13222031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288734 (or 1288726 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 13222031220 its reverse (2213022231), we get a palindrome (15435053451).

The spelling of 13222031220 in words is "thirteen billion, two hundred twenty-two million, thirty-one thousand, two hundred twenty".