2111122404 has 72 divisors (see below), whose sum is σ = 5447802360. Its totient is φ = 689126400.

The previous prime is 2111122381. The next prime is 2111122411. The reversal of 2111122404 is 4042211112.

It can be written as a sum of positive squares in 4 ways, for example, as 90440100 + 2020682304 = 9510^2 + 44952^2 .

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

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 527242 + ... + 531230.

Almost surely, 2^2111122404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111122404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2723901180).

2111122404 is an abundant number, since it is smaller than the sum of its proper divisors (3336679956).

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

2111122404 is a wasteful number, since it uses less digits than its factorization.

2111122404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301 (or 4296 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2111122404 is about 45946.9520643100. The cubic root of 2111122404 is about 1282.8359978266.

Adding to 2111122404 its reverse (4042211112), we get a palindrome (6153333516).

The spelling of 2111122404 in words is "two billion, one hundred eleven million, one hundred twenty-two thousand, four hundred four".