2133123220 has 24 divisors (see below), whose sum is σ = 4546420704. Its totient is φ = 840513696.

The previous prime is 2133123193. The next prime is 2133123227. The reversal of 2133123220 is 223213312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133123227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794602 + ... + 797281.

It is an arithmetic number, because the mean of its divisors is an integer number (189434196).

Almost surely, 2^2133123220 is an apocalyptic number.

2133123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2133123220 is an abundant number, since it is smaller than the sum of its proper divisors (2413297484).

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

2133123220 is a wasteful number, since it uses less digits than its factorization.

2133123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591959 (or 1591957 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2133123220 is about 46185.7469356077. The cubic root of 2133123220 is about 1287.2769151297.

Adding to 2133123220 its reverse (223213312), we get a palindrome (2356336532).

It can be divided in two parts, 21331 and 23220, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 2133123220 in words is "two billion, one hundred thirty-three million, one hundred twenty-three thousand, two hundred twenty".