11243421243 has 8 divisors (see below), whose sum is σ = 16656920400. Its totient is φ = 7495614144.

The previous prime is 11243421227. The next prime is 11243421251. The reversal of 11243421243 is 34212434211.

11243421243 is a `hidden beast` number, since 1 + 12 + 434 + 212 + 4 + 3 = 666.

It is not a de Polignac number, because 11243421243 - 2⁴ = 11243421227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 416423009 = 11243421243 / (1 + 1 + 2 + 4 + 3 + 4 + 2 + 1 + 2 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (11243421443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208211478 + ... + 208211531.

It is an arithmetic number, because the mean of its divisors is an integer number (2082115050).

Almost surely, 2^11243421243 is an apocalyptic number.

11243421243 is a deficient number, since it is larger than the sum of its proper divisors (5413499157).

11243421243 is an equidigital number, since it uses as much as digits as its factorization.

11243421243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416423018 (or 416423012 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 11243421243 its reverse (34212434211), we get a palindrome (45455855454).

The spelling of 11243421243 in words is "eleven billion, two hundred forty-three million, four hundred twenty-one thousand, two hundred forty-three".