1221122322 has 96 divisors (see below), whose sum is σ = 3172096512. Its totient is φ = 332180352.

The previous prime is 1221122321. The next prime is 1221122327. The reversal of 1221122322 is 2232211221.

1221122322 is a `hidden beast` number, since 1 + 221 + 122 + 322 = 666.

It is a super-2 number, since 2×1221122322² = 2982279450573343368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1221122295 and 1221122304.

It is not an unprimeable number, because it can be changed into a prime (1221122321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 216328 + ... + 221900.

It is an arithmetic number, because the mean of its divisors is an integer number (33042672).

Almost surely, 2^1221122322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221122322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1586048256).

1221122322 is an abundant number, since it is smaller than the sum of its proper divisors (1950974190).

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

1221122322 is a wasteful number, since it uses less digits than its factorization.

1221122322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672 (or 5669 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1221122322 is about 34944.5606926171. The cubic root of 1221122322 is about 1068.8572894035.

Adding to 1221122322 its reverse (2232211221), we get a palindrome (3453333543).

The spelling of 1221122322 in words is "one billion, two hundred twenty-one million, one hundred twenty-two thousand, three hundred twenty-two".