2133235621 has 32 divisors (see below), whose sum is σ = 2558160000. Its totient is φ = 1757064960.

The previous prime is 2133235619. The next prime is 2133235639. The reversal of 2133235621 is 1265323312.

It is a cyclic number.

It is not a de Polignac number, because 2133235621 - 2¹ = 2133235619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2133235621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133235661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 659035 + ... + 662263.

It is an arithmetic number, because the mean of its divisors is an integer number (79942500).

Almost surely, 2^2133235621 is an apocalyptic number.

It is an amenable number.

2133235621 is a deficient number, since it is larger than the sum of its proper divisors (424924379).

2133235621 is a wasteful number, since it uses less digits than its factorization.

2133235621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397.

The product of its digits is 6480, while the sum is 28.

The square root of 2133235621 is about 46186.9637560210. The cubic root of 2133235621 is about 1287.2995249615.

Adding to 2133235621 its reverse (1265323312), we get a palindrome (3398558933).

It can be divided in two parts, 21332 and 35621, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 2133235621 in words is "two billion, one hundred thirty-three million, two hundred thirty-five thousand, six hundred twenty-one".