1213221199 has 8 divisors (see below), whose sum is σ = 1242083520. Its totient is φ = 1184486016.

The previous prime is 1213221169. The next prime is 1213221203. The reversal of 1213221199 is 9911223121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213221199 - 2¹⁹ = 1212696911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213221199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213221169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12334 + ... + 50779.

It is an arithmetic number, because the mean of its divisors is an integer number (155260440).

Almost surely, 2^1213221199 is an apocalyptic number.

1213221199 is a deficient number, since it is larger than the sum of its proper divisors (28862321).

1213221199 is an equidigital number, since it uses as much as digits as its factorization.

1213221199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63569.

The product of its digits is 1944, while the sum is 31.

The square root of 1213221199 is about 34831.3249676207. The cubic root of 1213221199 is about 1066.5469958301.

The spelling of 1213221199 in words is "one billion, two hundred thirteen million, two hundred twenty-one thousand, one hundred ninety-nine".