11111212133103 has 4 divisors (see below), whose sum is σ = 14814949510808. Its totient is φ = 7407474755400.

The previous prime is 11111212133041. The next prime is 11111212133113. The reversal of 11111212133103 is 30133121211111.

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

It is not a de Polignac number, because 11111212133103 - 2¹⁸ = 11111211870959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11111212133103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111212133113) 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, 1851868688848 + ... + 1851868688853.

It is an arithmetic number, because the mean of its divisors is an integer number (3703737377702).

Almost surely, 2^{11111212133103} is an apocalyptic number.

11111212133103 is a deficient number, since it is larger than the sum of its proper divisors (3703737377705).

11111212133103 is an equidigital number, since it uses as much as digits as its factorization.

11111212133103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703737377704.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 11111212133103 its reverse (30133121211111), we get a palindrome (41244333344214).

The spelling of 11111212133103 in words is "eleven trillion, one hundred eleven billion, two hundred twelve million, one hundred thirty-three thousand, one hundred three".