2133956121 has 24 divisors (see below), whose sum is σ = 3135820800. Its totient is φ = 1289845920.

The previous prime is 2133956057. The next prime is 2133956159. The reversal of 2133956121 is 1216593312.

It is not a de Polignac number, because 2133956121 - 2⁶ = 2133956057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2133956171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131355 + ... + 146703.

It is an arithmetic number, because the mean of its divisors is an integer number (130659200).

Almost surely, 2^2133956121 is an apocalyptic number.

It is an amenable number.

2133956121 is a deficient number, since it is larger than the sum of its proper divisors (1001864679).

2133956121 is a wasteful number, since it uses less digits than its factorization.

2133956121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15757 (or 15746 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 2133956121 is about 46194.7629174563. The cubic root of 2133956121 is about 1287.4444370530. Note that the first 4 decimals are identical.

The spelling of 2133956121 in words is "two billion, one hundred thirty-three million, nine hundred fifty-six thousand, one hundred twenty-one".