11311221212124 has 48 divisors (see below), whose sum is σ = 26543536185600. Its totient is φ = 3748885545856.

The previous prime is 11311221212111. The next prime is 11311221212141. The reversal of 11311221212124 is 42121212211311.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 11311221212094 and 11311221212103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17504617 + ... + 18139295.

It is an arithmetic number, because the mean of its divisors is an integer number (552990337200).

Almost surely, 2^{11311221212124} is an apocalyptic number.

It is an amenable number.

11311221212124 is an abundant number, since it is smaller than the sum of its proper divisors (15232314973476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11311221212124 is a wasteful number, since it uses less digits than its factorization.

11311221212124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643162 (or 643160 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

Adding to 11311221212124 its reverse (42121212211311), we get a palindrome (53432433423435).

The spelling of 11311221212124 in words is "eleven trillion, three hundred eleven billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-four".