2133121020 has 24 divisors (see below), whose sum is σ = 5972739024. Its totient is φ = 568832256.

The previous prime is 2133120973. The next prime is 2133121021. The reversal of 2133121020 is 201213312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133121021) 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, 17775949 + ... + 17776068.

It is an arithmetic number, because the mean of its divisors is an integer number (248864126).

Almost surely, 2^2133121020 is an apocalyptic number.

2133121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2133121020 is an abundant number, since it is smaller than the sum of its proper divisors (3839618004).

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

2133121020 is a wasteful number, since it uses less digits than its factorization.

2133121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35552029 (or 35552027 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2133121020 is about 46185.7231187301. The cubic root of 2133121020 is about 1287.2764725846.

Adding to 2133121020 its reverse (201213312), we get a palindrome (2334334332).

The spelling of 2133121020 in words is "two billion, one hundred thirty-three million, one hundred twenty-one thousand, twenty".