2133200231221 has 4 divisors (see below), whose sum is σ = 2133414827244. Its totient is φ = 2132985635200.

The previous prime is 2133200231203. The next prime is 2133200231237. The reversal of 2133200231221 is 1221320023312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 239232504996 + 1893967726225 = 489114^2 + 1376215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133200231221 - 2¹⁷ = 2133200100149 is a prime.

It is a super-3 number, since 3×2133200231221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2133200231192 and 2133200231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133200231521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107283100 + ... + 107302981.

It is an arithmetic number, because the mean of its divisors is an integer number (533353706811).

Almost surely, 2^{2133200231221} is an apocalyptic number.

It is an amenable number.

2133200231221 is a deficient number, since it is larger than the sum of its proper divisors (214596023).

2133200231221 is an equidigital number, since it uses as much as digits as its factorization.

2133200231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214596022.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2133200231221 its reverse (1221320023312), we get a palindrome (3354520254533).

The spelling of 2133200231221 in words is "two trillion, one hundred thirty-three billion, two hundred million, two hundred thirty-one thousand, two hundred twenty-one".