1221113299 has 8 divisors (see below), whose sum is σ = 1469008640. Its totient is φ = 991580616.

The previous prime is 1221113297. The next prime is 1221113303. The reversal of 1221113299 is 9923111221.

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 1221113299 - 2¹ = 1221113297 is a prime.

It is a super-2 number, since 2×1221113299² = 2982235377989326802, which contains 22 as substring.

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 1221113299.

It is not an unprimeable number, because it can be changed into a prime (1221113297) 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, 4590519 + ... + 4590784.

It is an arithmetic number, because the mean of its divisors is an integer number (183626080).

Almost surely, 2^1221113299 is an apocalyptic number.

1221113299 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1221113299 is a deficient number, since it is larger than the sum of its proper divisors (247895341).

1221113299 is an equidigital number, since it uses as much as digits as its factorization.

1221113299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9181329.

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

The square root of 1221113299 is about 34944.4315878796. The cubic root of 1221113299 is about 1068.8546567644.

The spelling of 1221113299 in words is "one billion, two hundred twenty-one million, one hundred thirteen thousand, two hundred ninety-nine".