12011111101212 has 72 divisors (see below), whose sum is σ = 28703169465600. Its totient is φ = 3908605464192.

The previous prime is 12011111101189. The next prime is 12011111101267. The reversal of 12011111101212 is 21210111111021.

It is a junction number, because it is equal to n+sod(n) for n = 12011111101191 and 12011111101200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6709339 + ... + 8308877.

Almost surely, 2^{12011111101212} is an apocalyptic number.

12011111101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12011111101212 is an abundant number, since it is smaller than the sum of its proper divisors (16692058364388).

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

12011111101212 is a wasteful number, since it uses less digits than its factorization.

12011111101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599803 (or 1599712 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12011111101212 its reverse (21210111111021), we get a palindrome (33221222212233).

The spelling of 12011111101212 in words is "twelve trillion, eleven billion, one hundred eleven million, one hundred one thousand, two hundred twelve".