2112111021204 has 36 divisors (see below), whose sum is σ = 5339191428480. Its totient is φ = 704004814800.

The previous prime is 2112111021203. The next prime is 2112111021217. The reversal of 2112111021204 is 4021201112112.

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

It is a super-2 number, since 2×2112111021204² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112111021203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 536484 + ... + 2124155.

Almost surely, 2^{2112111021204} is an apocalyptic number.

It is an amenable number.

2112111021204 is an abundant number, since it is smaller than the sum of its proper divisors (3227080407276).

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

2112111021204 is a wasteful number, since it uses less digits than its factorization.

2112111021204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682700 (or 2682695 counting only the distinct ones).

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

Adding to 2112111021204 its reverse (4021201112112), we get a palindrome (6133312133316).

The spelling of 2112111021204 in words is "two trillion, one hundred twelve billion, one hundred eleven million, twenty-one thousand, two hundred four".