2111121211212 has 36 divisors (see below), whose sum is σ = 5746941076240. Its totient is φ = 649575757152.

The previous prime is 2111121211207. The next prime is 2111121211219. The reversal of 2111121211212 is 2121121211112.

It is a happy number.

2111121211212 is a `hidden beast` number, since 211 + 11 + 21 + 211 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 (2111121211219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2255470912 + ... + 2255471847.

Almost surely, 2^{2111121211212} is an apocalyptic number.

It is an amenable number.

2111121211212 is an abundant number, since it is smaller than the sum of its proper divisors (3635819865028).

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

2111121211212 is a wasteful number, since it uses less digits than its factorization.

2111121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510942782 (or 4510942777 counting only the distinct ones).

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

Adding to 2111121211212 its reverse (2121121211112), we get a palindrome (4232242422324).

The spelling of 2111121211212 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".