2111100121212 has 12 divisors (see below), whose sum is σ = 4925900282856. Its totient is φ = 703700040400.

The previous prime is 2111100121199. The next prime is 2111100121223. The reversal of 2111100121212 is 2121210011112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2111100121191 and 2111100121200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87962505039 + ... + 87962505062.

It is an arithmetic number, because the mean of its divisors is an integer number (410491690238).

Almost surely, 2^{2111100121212} is an apocalyptic number.

It is an amenable number.

2111100121212 is an abundant number, since it is smaller than the sum of its proper divisors (2814800161644).

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

2111100121212 is a wasteful number, since it uses less digits than its factorization.

2111100121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175925010108 (or 175925010106 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2111100121212 its reverse (2121210011112), we get a palindrome (4232310132324).

The spelling of 2111100121212 in words is "two trillion, one hundred eleven billion, one hundred million, one hundred twenty-one thousand, two hundred twelve".