1221433107 has 16 divisors (see below), whose sum is σ = 1773408000. Its totient is φ = 744829344.

The previous prime is 1221433099. The next prime is 1221433121. The reversal of 1221433107 is 7013341221.

It is a happy number.

It is not a de Polignac number, because 1221433107 - 2³ = 1221433099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221433207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367807 + ... + 371112.

It is an arithmetic number, because the mean of its divisors is an integer number (110838000).

Almost surely, 2^1221433107 is an apocalyptic number.

1221433107 is a deficient number, since it is larger than the sum of its proper divisors (551974893).

1221433107 is a wasteful number, since it uses less digits than its factorization.

1221433107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738970.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1221433107 is about 34949.0072391191. The cubic root of 1221433107 is about 1068.9479591722.

Adding to 1221433107 its reverse (7013341221), we get a palindrome (8234774328).

It can be divided in two parts, 122143 and 3107, that added together give a triangular number (125250 = T₅₀₀).

The spelling of 1221433107 in words is "one billion, two hundred twenty-one million, four hundred thirty-three thousand, one hundred seven".