1221248933 has 2 divisors, whose sum is σ = 1221248934. Its totient is φ = 1221248932.

The previous prime is 1221248923. The next prime is 1221248981. The reversal of 1221248933 is 3398421221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998433604 + 222815329 = 31598^2 + 14927^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221248933 - 2²⁰ = 1220200357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221248893 and 1221248902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221248923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610624466 + 610624467.

It is an arithmetic number, because the mean of its divisors is an integer number (610624467).

Almost surely, 2^1221248933 is an apocalyptic number.

It is an amenable number.

1221248933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221248933 is an equidigital number, since it uses as much as digits as its factorization.

1221248933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 1221248933 is about 34946.3722437680. The cubic root of 1221248933 is about 1068.8942293046.

The spelling of 1221248933 in words is "one billion, two hundred twenty-one million, two hundred forty-eight thousand, nine hundred thirty-three".