1221113308 has 12 divisors (see below), whose sum is σ = 2143073800. Its totient is φ = 608806512.

The previous prime is 1221113303. The next prime is 1221113317. The reversal of 1221113308 is 8033111221.

It is a happy number.

It is a super-2 number, since 2×1221113308² = 2982235421949405728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221113303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435966 + ... + 438757.

Almost surely, 2^1221113308 is an apocalyptic number.

It is an amenable number.

1221113308 is a deficient number, since it is larger than the sum of its proper divisors (921960492).

1221113308 is a wasteful number, since it uses less digits than its factorization.

1221113308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875076 (or 875074 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1221113308 is about 34944.4317166555. The cubic root of 1221113308 is about 1068.8546593904.

Adding to 1221113308 its reverse (8033111221), we get a palindrome (9254224529).

The spelling of 1221113308 in words is "one billion, two hundred twenty-one million, one hundred thirteen thousand, three hundred eight".