1122213220 has 24 divisors (see below), whose sum is σ = 2389843008. Its totient is φ = 442562400.

The previous prime is 1122213187. The next prime is 1122213227. The reversal of 1122213220 is 223122211.

It is a happy number.

It is a super-2 number, since 2×1122213220² = 2518725022285536800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1122213194 and 1122213203.

It is not an unprimeable number, because it can be changed into a prime (1122213227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393726 + ... + 396565.

It is an arithmetic number, because the mean of its divisors is an integer number (99576792).

Almost surely, 2^1122213220 is an apocalyptic number.

1122213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122213220 is an abundant number, since it is smaller than the sum of its proper divisors (1267629788).

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

1122213220 is a wasteful number, since it uses less digits than its factorization.

1122213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790371 (or 790369 counting only the distinct ones).

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

The square root of 1122213220 is about 33499.4510402783. The cubic root of 1122213220 is about 1039.1824257434.

Adding to 1122213220 its reverse (223122211), we get a palindrome (1345335431).

It can be divided in two parts, 11222 and 13220, that added together give a palindrome (24442).

The spelling of 1122213220 in words is "one billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred twenty".