133001212121 has 4 divisors (see below), whose sum is σ = 140824812852. Its totient is φ = 125177611392.

The previous prime is 133001212117. The next prime is 133001212159. The reversal of 133001212121 is 121212100331.

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 105325562521 + 27675649600 = 324539^2 + 166360^2 .

It is a cyclic number.

It is not a de Polignac number, because 133001212121 - 2² = 133001212117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7823600713 = 133001212121 / (1 + 3 + 3 + 0 + 0 + 1 + 2 + 1 + 2 + 1 + 2 + 1).

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 133001212121.

It is not an unprimeable number, because it can be changed into a prime (133001212171) 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, 3911800340 + ... + 3911800373.

It is an arithmetic number, because the mean of its divisors is an integer number (35206203213).

Almost surely, 2^133001212121 is an apocalyptic number.

It is an amenable number.

133001212121 is a deficient number, since it is larger than the sum of its proper divisors (7823600731).

133001212121 is an equidigital number, since it uses as much as digits as its factorization.

133001212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7823600730.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 133001212121 its reverse (121212100331), we get a palindrome (254213312452).

The spelling of 133001212121 in words is "one hundred thirty-three billion, one million, two hundred twelve thousand, one hundred twenty-one".