1122220220 has 48 divisors (see below), whose sum is σ = 2573224416. Its totient is φ = 407712000.

The previous prime is 1122220207. The next prime is 1122220241. The reversal of 1122220220 is 220222211.

It is a junction number, because it is equal to n+sod(n) for n = 1122220195 and 1122220204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408050 + ... + 410790.

It is an arithmetic number, because the mean of its divisors is an integer number (53608842).

Almost surely, 2^1122220220 is an apocalyptic number.

1122220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122220220 is an abundant number, since it is smaller than the sum of its proper divisors (1451004196).

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

1122220220 is a wasteful number, since it uses less digits than its factorization.

1122220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622 (or 4620 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1122220220 is about 33499.5555194394. Note that the first 4 decimals coincide. The cubic root of 1122220220 is about 1039.1845864326.

Adding to 1122220220 its reverse (220222211), we get a palindrome (1342442431).

The spelling of 1122220220 in words is "one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty".