11311211120 has 80 divisors (see below), whose sum is σ = 30376993248. Its totient is φ = 3871211520.

The previous prime is 11311211083. The next prime is 11311211129. The reversal of 11311211120 is 2111211311.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 11311211095 and 11311211104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311211129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363089 + ... + 393008.

Almost surely, 2^11311211120 is an apocalyptic number.

11311211120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311211120 is an abundant number, since it is smaller than the sum of its proper divisors (19065782128).

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

11311211120 is a wasteful number, since it uses less digits than its factorization.

11311211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756138 (or 756132 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11311211120 its reverse (2111211311), we get a palindrome (13422422431).

The spelling of 11311211120 in words is "eleven billion, three hundred eleven million, two hundred eleven thousand, one hundred twenty".