133333422121 has 4 divisors (see below), whose sum is σ = 134070071044. Its totient is φ = 132596773200.

The previous prime is 133333422113. The next prime is 133333422197. The reversal of 133333422121 is 121224333331.

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 19200259225 + 114133162896 = 138565^2 + 337836^2 .

It is a cyclic number.

It is not a de Polignac number, because 133333422121 - 2³ = 133333422113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133333422121.

It is not an unprimeable number, because it can be changed into a prime (133333422221) 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, 368324190 + ... + 368324551.

It is an arithmetic number, because the mean of its divisors is an integer number (33517517761).

Almost surely, 2^133333422121 is an apocalyptic number.

It is an amenable number.

133333422121 is a deficient number, since it is larger than the sum of its proper divisors (736648923).

133333422121 is an equidigital number, since it uses as much as digits as its factorization.

133333422121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736648922.

The product of its digits is 7776, while the sum is 28.

Adding to 133333422121 its reverse (121224333331), we get a palindrome (254557755452).

The spelling of 133333422121 in words is "one hundred thirty-three billion, three hundred thirty-three million, four hundred twenty-two thousand, one hundred twenty-one".