1122422220 has 144 divisors (see below), whose sum is σ = 3468235680. Its totient is φ = 293787648.

The previous prime is 1122422201. The next prime is 1122422237. The reversal of 1122422220 is 222242211.

1122422220 is a `hidden beast` number, since 1 + 1 + 22 + 422 + 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 = 1122422193 and 1122422202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2827062 + ... + 2827458.

It is an arithmetic number, because the mean of its divisors is an integer number (24084970).

Almost surely, 2^1122422220 is an apocalyptic number.

1122422220 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 1122422220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734117840).

1122422220 is an abundant number, since it is smaller than the sum of its proper divisors (2345813460).

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

1122422220 is a wasteful number, since it uses less digits than its factorization.

1122422220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1122422220 is about 33502.5703491538. The cubic root of 1122422220 is about 1039.2469338783.

Adding to 1122422220 its reverse (222242211), we get a palindrome (1344664431).

Subtracting from 1122422220 its reverse (222242211), we obtain a square (900180009 = 30003²).

The spelling of 1122422220 in words is "one billion, one hundred twenty-two million, four hundred twenty-two thousand, two hundred twenty".