1235421320503 has 4 divisors (see below), whose sum is σ = 1268811085960. Its totient is φ = 1202031555048.

The previous prime is 1235421320501. The next prime is 1235421320587. The reversal of 1235421320503 is 3050231245321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1235421320503 - 2¹ = 1235421320501 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 (1235421320501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16694882673 + ... + 16694882746.

It is an arithmetic number, because the mean of its divisors is an integer number (317202771490).

Almost surely, 2^{1235421320503} is an apocalyptic number.

1235421320503 is a deficient number, since it is larger than the sum of its proper divisors (33389765457).

1235421320503 is an equidigital number, since it uses as much as digits as its factorization.

1235421320503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33389765456.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 1235421320503 its reverse (3050231245321), we get a palindrome (4285652565824).

The spelling of 1235421320503 in words is "one trillion, two hundred thirty-five billion, four hundred twenty-one million, three hundred twenty thousand, five hundred three".