11121111111012 has 48 divisors (see below), whose sum is σ = 30945700488192. Its totient is φ = 3039309868320.

The previous prime is 11121111110911. The next prime is 11121111111017. The reversal of 11121111111012 is 21011111112111.

It is a happy number.

It is a super-2 number, since 2×11121111111012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11121111110982 and 11121111111000.

It is not an unprimeable number, because it can be changed into a prime (11121111111017) 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, 2878132414 + ... + 2878136277.

It is an arithmetic number, because the mean of its divisors is an integer number (644702093504).

Almost surely, 2^{11121111111012} is an apocalyptic number.

11121111111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11121111111012 is an abundant number, since it is smaller than the sum of its proper divisors (19824589377180).

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

11121111111012 is a wasteful number, since it uses less digits than its factorization.

11121111111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756268728 (or 5756268726 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 11121111111012 its reverse (21011111112111), we get a palindrome (32132222223123).

The spelling of 11121111111012 in words is "eleven trillion, one hundred twenty-one billion, one hundred eleven million, one hundred eleven thousand, twelve".