1212103721503 has 2 divisors, whose sum is σ = 1212103721504. Its totient is φ = 1212103721502.

The previous prime is 1212103721483. The next prime is 1212103721551. The reversal of 1212103721503 is 3051273012121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212103721503 - 2¹³ = 1212103713311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212103751503) 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, 606051860751 + 606051860752.

It is an arithmetic number, because the mean of its divisors is an integer number (606051860752).

Almost surely, 2^{1212103721503} is an apocalyptic number.

1212103721503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212103721503 is an equidigital number, since it uses as much as digits as its factorization.

1212103721503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

Adding to 1212103721503 its reverse (3051273012121), we get a palindrome (4263376733624).

The spelling of 1212103721503 in words is "one trillion, two hundred twelve billion, one hundred three million, seven hundred twenty-one thousand, five hundred three".