1221083222 has 36 divisors (see below), whose sum is σ = 2003052636. Its totient is φ = 558185040.

The previous prime is 1221083221. The next prime is 1221083243. The reversal of 1221083222 is 2223801221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221083221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 606197 + ... + 608207.

It is an arithmetic number, because the mean of its divisors is an integer number (55640351).

Almost surely, 2^1221083222 is an apocalyptic number.

1221083222 is a deficient number, since it is larger than the sum of its proper divisors (781969414).

1221083222 is a wasteful number, since it uses less digits than its factorization.

1221083222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109 (or 2061 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1221083222 is about 34944.0012305403. The cubic root of 1221083222 is about 1068.8458811099.

Adding to 1221083222 its reverse (2223801221), we get a palindrome (3444884443).

The spelling of 1221083222 in words is "one billion, two hundred twenty-one million, eighty-three thousand, two hundred twenty-two".