2111022121212 has 72 divisors (see below), whose sum is σ = 5650659626976. Its totient is φ = 662214518784.

The previous prime is 2111022121193. The next prime is 2111022121259. The reversal of 2111022121212 is 2121212201112.

2111022121212 is a `hidden beast` number, since 211 + 1 + 0 + 221 + 21 + 212 = 666.

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

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, 6068913 + ... + 6407319.

It is an arithmetic number, because the mean of its divisors is an integer number (78481383708).

Almost surely, 2^{2111022121212} is an apocalyptic number.

It is an amenable number.

2111022121212 is an abundant number, since it is smaller than the sum of its proper divisors (3539637505764).

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

2111022121212 is a wasteful number, since it uses less digits than its factorization.

2111022121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348627 (or 348622 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2111022121212 its reverse (2121212201112), we get a palindrome (4232234322324).

The spelling of 2111022121212 in words is "two trillion, one hundred eleven billion, twenty-two million, one hundred twenty-one thousand, two hundred twelve".