1224221293 has 2 divisors, whose sum is σ = 1224221294. Its totient is φ = 1224221292.

The previous prime is 1224221171. The next prime is 1224221311. The reversal of 1224221293 is 3921224221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030538404 + 193682889 = 32102^2 + 13917^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224221293 - 2¹³ = 1224213101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224221893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612110646 + 612110647.

It is an arithmetic number, because the mean of its divisors is an integer number (612110647).

Almost surely, 2^1224221293 is an apocalyptic number.

It is an amenable number.

1224221293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224221293 is an equidigital number, since it uses as much as digits as its factorization.

1224221293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 1224221293 is about 34988.8738458385. The cubic root of 1224221293 is about 1069.7607095844.

The spelling of 1224221293 in words is "one billion, two hundred twenty-four million, two hundred twenty-one thousand, two hundred ninety-three".