12121112011112 has 32 divisors (see below), whose sum is σ = 24497392285800. Its totient is φ = 5589314828544.

The previous prime is 12121112011103. The next prime is 12121112011133. The reversal of 12121112011112 is 21111021112121.

It can be written as a sum of positive squares in 4 ways, for example, as 3521755169956 + 8599356841156 = 1876634^2 + 2932466^2 .

It is a super-2 number, since 2×12121112011112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52431623 + ... + 52662294.

Almost surely, 2^{12121112011112} is an apocalyptic number.

It is an amenable number.

12121112011112 is an abundant number, since it is smaller than the sum of its proper divisors (12376280274688).

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

12121112011112 is a wasteful number, since it uses less digits than its factorization.

12121112011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105095045 (or 105095041 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12121112011112 its reverse (21111021112121), we get a palindrome (33232133123233).

It can be divided in two parts, 1212111 and 2011112, that added together give a palindrome (3223223).

The spelling of 12121112011112 in words is "twelve trillion, one hundred twenty-one billion, one hundred twelve million, eleven thousand, one hundred twelve".