1221442003 has 2 divisors, whose sum is σ = 1221442004. Its totient is φ = 1221442002.

The previous prime is 1221441997. The next prime is 1221442021. The reversal of 1221442003 is 3002441221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221442003 - 2¹⁷ = 1221310931 is a prime.

It is a super-3 number, since 3×1221442003³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1221442043) 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 as a sum of consecutive naturals, namely, 610721001 + 610721002.

It is an arithmetic number, because the mean of its divisors is an integer number (610721002).

Almost surely, 2^1221442003 is an apocalyptic number.

1221442003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221442003 is an equidigital number, since it uses as much as digits as its factorization.

1221442003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1221442003 is about 34949.1345100276. The cubic root of 1221442003 is about 1068.9505543035.

Adding to 1221442003 its reverse (3002441221), we get a palindrome (4223883224).

The spelling of 1221442003 in words is "one billion, two hundred twenty-one million, four hundred forty-two thousand, three".