2111145204 has 72 divisors (see below), whose sum is σ = 6067353600. Its totient is φ = 567700224.

The previous prime is 2111145121. The next prime is 2111145209. The reversal of 2111145204 is 4025411112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111145209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95604 + ... + 115595.

It is an arithmetic number, because the mean of its divisors is an integer number (84268800).

Almost surely, 2^2111145204 is an apocalyptic number.

It is an amenable number.

2111145204 is an abundant number, since it is smaller than the sum of its proper divisors (3956208396).

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

2111145204 is a wasteful number, since it uses less digits than its factorization.

2111145204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211237 (or 211228 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 2111145204 is about 45947.2001758540. The cubic root of 2111145204 is about 1282.8406159948.

Adding to 2111145204 its reverse (4025411112), we get a palindrome (6136556316).

The spelling of 2111145204 in words is "two billion, one hundred eleven million, one hundred forty-five thousand, two hundred four".