1211112212112 has 80 divisors (see below), whose sum is σ = 3792371588160. Its totient is φ = 367003699200.

The previous prime is 1211112212069. The next prime is 1211112212113. The reversal of 1211112212112 is 2112122111121.

It is a happy number.

1211112212112 is a `hidden beast` number, since 121 + 111 + 221 + 211 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is not an unprimeable number, because it can be changed into a prime (1211112212113) 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, 127427089 + ... + 127436592.

It is an arithmetic number, because the mean of its divisors is an integer number (47404644852).

Almost surely, 2^{1211112212112} is an apocalyptic number.

1211112212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211112212112 is an abundant number, since it is smaller than the sum of its proper divisors (2581259376048).

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

1211112212112 is a wasteful number, since it uses less digits than its factorization.

1211112212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254863709 (or 254863697 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 1211112212112 its reverse (2112122111121), we get a palindrome (3323234323233).

The spelling of 1211112212112 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred twelve thousand, one hundred twelve".