133202243421 has 40 divisors (see below), whose sum is σ = 220078984664. Its totient is φ = 79755166080.

The previous prime is 133202243407. The next prime is 133202243431. The reversal of 133202243421 is 124342202331.

133202243421 is a `hidden beast` number, since 1 + 3 + 3 + 202 + 2 + 434 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 26086772196 + 107115471225 = 161514^2 + 327285^2 .

It is not a de Polignac number, because 133202243421 - 2⁶ = 133202243357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133202243431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1670470 + ... + 1748391.

Almost surely, 2^133202243421 is an apocalyptic number.

It is an amenable number.

133202243421 is a deficient number, since it is larger than the sum of its proper divisors (86876741243).

133202243421 is a wasteful number, since it uses less digits than its factorization.

133202243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418923 (or 3418914 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 133202243421 its reverse (124342202331), we get a palindrome (257544445752).

The spelling of 133202243421 in words is "one hundred thirty-three billion, two hundred two million, two hundred forty-three thousand, four hundred twenty-one".