11503211243 has 2 divisors, whose sum is σ = 11503211244. Its totient is φ = 11503211242.

The previous prime is 11503211219. The next prime is 11503211407. The reversal of 11503211243 is 34211230511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11503211243 - 2¹⁰ = 11503210219 is a prime.

It is not a weakly prime, because it can be changed into another prime (11503261243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5751605621 + 5751605622.

It is an arithmetic number, because the mean of its divisors is an integer number (5751605622).

Almost surely, 2^11503211243 is an apocalyptic number.

11503211243 is a deficient number, since it is larger than the sum of its proper divisors (1).

11503211243 is an equidigital number, since it uses as much as digits as its factorization.

11503211243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 11503211243 its reverse (34211230511), we get a palindrome (45714441754).

The spelling of 11503211243 in words is "eleven billion, five hundred three million, two hundred eleven thousand, two hundred forty-three".