133112300221 has 4 divisors (see below), whose sum is σ = 133113165372. Its totient is φ = 133111435072.

The previous prime is 133112300143. The next prime is 133112300249. The reversal of 133112300221 is 122003211331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122003211331 = 19 ⋅6421221649.

It can be written as a sum of positive squares in 2 ways, for example, as 61199832996 + 71912467225 = 247386^2 + 268165^2 .

It is a cyclic number.

It is not a de Polignac number, because 133112300221 - 2²¹ = 133110203069 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 (133112300261) 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, 132310 + ... + 532663.

It is an arithmetic number, because the mean of its divisors is an integer number (33278291343).

Almost surely, 2^133112300221 is an apocalyptic number.

It is an amenable number.

133112300221 is a deficient number, since it is larger than the sum of its proper divisors (865151).

133112300221 is an equidigital number, since it uses as much as digits as its factorization.

133112300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865150.

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

Adding to 133112300221 its reverse (122003211331), we get a palindrome (255115511552).

The spelling of 133112300221 in words is "one hundred thirty-three billion, one hundred twelve million, three hundred thousand, two hundred twenty-one".