133231202121 has 4 divisors (see below), whose sum is σ = 177641602832. Its totient is φ = 88820801412.

The previous prime is 133231202119. The next prime is 133231202183. The reversal of 133231202121 is 121202132331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133231202121 - 2¹ = 133231202119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133231202101) 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 3 ways as a sum of consecutive naturals, for example, 22205200351 + ... + 22205200356.

It is an arithmetic number, because the mean of its divisors is an integer number (44410400708).

Almost surely, 2^133231202121 is an apocalyptic number.

It is an amenable number.

133231202121 is a deficient number, since it is larger than the sum of its proper divisors (44410400711).

133231202121 is an equidigital number, since it uses as much as digits as its factorization.

133231202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44410400710.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 133231202121 its reverse (121202132331), we get a palindrome (254433334452).

The spelling of 133231202121 in words is "one hundred thirty-three billion, two hundred thirty-one million, two hundred two thousand, one hundred twenty-one".