1222211320 has 96 divisors (see below), whose sum is σ = 3068629200. Its totient is φ = 437690880.

The previous prime is 1222211303. The next prime is 1222211371. The reversal of 1222211320 is 231122221.

It is a happy number.

It is a super-2 number, since 2×1222211320² = 2987601021472284800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222211294 and 1222211303.

It is a congruent number.

It is an unprimeable number.

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, 322396 + ... + 326164.

Almost surely, 2^1222211320 is an apocalyptic number.

1222211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222211320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534314600).

1222211320 is an abundant number, since it is smaller than the sum of its proper divisors (1846417880).

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

1222211320 is a wasteful number, since it uses less digits than its factorization.

1222211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869 (or 3854 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1222211320 is about 34960.1390157419. The cubic root of 1222211320 is about 1069.1749309662.

Adding to 1222211320 its reverse (231122221), we get a palindrome (1453333541).

The spelling of 1222211320 in words is "one billion, two hundred twenty-two million, two hundred eleven thousand, three hundred twenty".