1212402503 has 4 divisors (see below), whose sum is σ = 1305664248. Its totient is φ = 1119140760.

The previous prime is 1212402491. The next prime is 1212402523. The reversal of 1212402503 is 3052042121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3052042121 = 50333 ⋅60637.

It is a cyclic number.

It is not a de Polignac number, because 1212402503 - 2¹⁰ = 1212401479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212402523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46630853 + ... + 46630878.

It is an arithmetic number, because the mean of its divisors is an integer number (326416062).

Almost surely, 2^1212402503 is an apocalyptic number.

1212402503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1212402503 is a deficient number, since it is larger than the sum of its proper divisors (93261745).

1212402503 is an equidigital number, since it uses as much as digits as its factorization.

1212402503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93261744.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1212402503 is about 34819.5706894844. The cubic root of 1212402503 is about 1066.3070356745.

Adding to 1212402503 its reverse (3052042121), we get a palindrome (4264444624).

The spelling of 1212402503 in words is "one billion, two hundred twelve million, four hundred two thousand, five hundred three".