133001312221 has 4 divisors (see below), whose sum is σ = 133008304572. Its totient is φ = 132994319872.

The previous prime is 133001312209. The next prime is 133001312291. The reversal of 133001312221 is 122213100331.

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 7398408196 + 125602904025 = 86014^2 + 354405^2 .

It is a cyclic number.

It is not a de Polignac number, because 133001312221 - 2¹¹ = 133001310173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133001312291) 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, 3467566 + ... + 3505711.

It is an arithmetic number, because the mean of its divisors is an integer number (33252076143).

Almost surely, 2^133001312221 is an apocalyptic number.

It is an amenable number.

133001312221 is a deficient number, since it is larger than the sum of its proper divisors (6992351).

133001312221 is an equidigital number, since it uses as much as digits as its factorization.

133001312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992350.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 133001312221 its reverse (122213100331), we get a palindrome (255214412552).

The spelling of 133001312221 in words is "one hundred thirty-three billion, one million, three hundred twelve thousand, two hundred twenty-one".