1122132220 has 72 divisors (see below), whose sum is σ = 2616393024. Its totient is φ = 403920000.

The previous prime is 1122132217. The next prime is 1122132233. The reversal of 1122132220 is 222312211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1122132194 and 1122132203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242125 + ... + 246715.

It is an arithmetic number, because the mean of its divisors is an integer number (36338792).

Almost surely, 2^1122132220 is an apocalyptic number.

1122132220 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 1122132220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308196512).

1122132220 is an abundant number, since it is smaller than the sum of its proper divisors (1494260804).

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

1122132220 is a wasteful number, since it uses less digits than its factorization.

1122132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723 (or 4710 counting only the distinct ones).

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

The square root of 1122132220 is about 33498.2420434267. The cubic root of 1122132220 is about 1039.1574228294.

Adding to 1122132220 its reverse (222312211), we get a palindrome (1344444431).

Subtracting from 1122132220 its reverse (222312211), we obtain a square (899820009 = 29997²).

The spelling of 1122132220 in words is "one billion, one hundred twenty-two million, one hundred thirty-two thousand, two hundred twenty".