1212221322 has 32 divisors (see below), whose sum is σ = 2901044160. Its totient is φ = 372990960.

The previous prime is 1212221287. The next prime is 1212221323. The reversal of 1212221322 is 2231222121.

1212221322 is a `hidden beast` number, since 121 + 2 + 221 + 322 = 666.

It is a super-2 number, since 2×1212221322² = 2938961067022855368, 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 = 1212221295 and 1212221304.

It is not an unprimeable number, because it can be changed into a prime (1212221323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862704 + ... + 864107.

It is an arithmetic number, because the mean of its divisors is an integer number (90657630).

Almost surely, 2^1212221322 is an apocalyptic number.

1212221322 is an abundant number, since it is smaller than the sum of its proper divisors (1688822838).

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

1212221322 is a wasteful number, since it uses less digits than its factorization.

1212221322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726835 (or 1726829 counting only the distinct ones).

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

The square root of 1212221322 is about 34816.9688801308. The cubic root of 1212221322 is about 1066.2539168466.

Adding to 1212221322 its reverse (2231222121), we get a palindrome (3443443443).

The spelling of 1212221322 in words is "one billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twenty-two".