1222421507 has 2 divisors, whose sum is σ = 1222421508. Its totient is φ = 1222421506.

The previous prime is 1222421471. The next prime is 1222421513. The reversal of 1222421507 is 7051242221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222421507 - 2¹² = 1222417411 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222423507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611210753 + 611210754.

It is an arithmetic number, because the mean of its divisors is an integer number (611210754).

Almost surely, 2^1222421507 is an apocalyptic number.

1222421507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222421507 is an equidigital number, since it uses as much as digits as its factorization.

1222421507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1222421507 is about 34963.1449815373. The cubic root of 1222421507 is about 1069.2362170920.

Adding to 1222421507 its reverse (7051242221), we get a palindrome (8273663728).

The spelling of 1222421507 in words is "one billion, two hundred twenty-two million, four hundred twenty-one thousand, five hundred seven".