1221253367 has 8 divisors (see below), whose sum is σ = 1306605360. Its totient is φ = 1138008960.

The previous prime is 1221253357. The next prime is 1221253373. The reversal of 1221253367 is 7633521221.

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 1221253367 - 2¹⁸ = 1220991223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221253357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525698 + ... + 528015.

It is an arithmetic number, because the mean of its divisors is an integer number (163325670).

Almost surely, 2^1221253367 is an apocalyptic number.

1221253367 is a deficient number, since it is larger than the sum of its proper divisors (85351993).

1221253367 is a wasteful number, since it uses less digits than its factorization.

1221253367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053793.

The product of its digits is 15120, while the sum is 32.

The square root of 1221253367 is about 34946.4356837718. The cubic root of 1221253367 is about 1068.8955229178.

Adding to 1221253367 its reverse (7633521221), we get a palindrome (8854774588).

The spelling of 1221253367 in words is "one billion, two hundred twenty-one million, two hundred fifty-three thousand, three hundred sixty-seven".