11311212403 has 4 divisors (see below), whose sum is σ = 11701254240. Its totient is φ = 10921170568.

The previous prime is 11311212379. The next prime is 11311212433. The reversal of 11311212403 is 30421211311.

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 11311212403 - 2¹³ = 11311204211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311212433) 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, 195020875 + ... + 195020932.

It is an arithmetic number, because the mean of its divisors is an integer number (2925313560).

Almost surely, 2^11311212403 is an apocalyptic number.

11311212403 is a deficient number, since it is larger than the sum of its proper divisors (390041837).

11311212403 is an equidigital number, since it uses as much as digits as its factorization.

11311212403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390041836.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11311212403 its reverse (30421211311), we get a palindrome (41732423714).

The spelling of 11311212403 in words is "eleven billion, three hundred eleven million, two hundred twelve thousand, four hundred three".