1212221199 has 32 divisors (see below), whose sum is σ = 1915200000. Its totient is φ = 667304064.

The previous prime is 1212221191. The next prime is 1212221221. The reversal of 1212221199 is 9911222121.

It is not a de Polignac number, because 1212221199 - 2³ = 1212221191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301897 + ... + 305885.

It is an arithmetic number, because the mean of its divisors is an integer number (59850000).

Almost surely, 2^1212221199 is an apocalyptic number.

1212221199 is a deficient number, since it is larger than the sum of its proper divisors (702978801).

1212221199 is a wasteful number, since it uses less digits than its factorization.

1212221199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527.

The product of its digits is 1296, while the sum is 30.

The square root of 1212221199 is about 34816.9671137507. The cubic root of 1212221199 is about 1066.2538807836.

The spelling of 1212221199 in words is "one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred ninety-nine".