133123132213221 has 4 divisors (see below), whose sum is σ = 177497509617632. Its totient is φ = 88748754808812.

The previous prime is 133123132213207. The next prime is 133123132213241. The reversal of 133123132213221 is 122312231321331.

It is a happy number.

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 133123132213221 - 2⁵ = 133123132213189 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 (133123132213241) 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, 22187188702201 + ... + 22187188702206.

It is an arithmetic number, because the mean of its divisors is an integer number (44374377404408).

Almost surely, 2^{133123132213221} is an apocalyptic number.

It is an amenable number.

133123132213221 is a deficient number, since it is larger than the sum of its proper divisors (44374377404411).

133123132213221 is an equidigital number, since it uses as much as digits as its factorization.

133123132213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44374377404410.

The product of its digits is 7776, while the sum is 30.

Adding to 133123132213221 its reverse (122312231321331), we get a palindrome (255435363534552).

The spelling of 133123132213221 in words is "one hundred thirty-three trillion, one hundred twenty-three billion, one hundred thirty-two million, two hundred thirteen thousand, two hundred twenty-one".