133220101 has 4 divisors (see below), whose sum is σ = 152251552. Its totient is φ = 114188652.

The previous prime is 133220093. The next prime is 133220123. The reversal of 133220101 is 101022331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101022331 = 257 ⋅393083.

It is a cyclic number.

It is not a de Polignac number, because 133220101 - 2³ = 133220093 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 (133220161) 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, 9515715 + ... + 9515728.

It is an arithmetic number, because the mean of its divisors is an integer number (38062888).

Almost surely, 2^133220101 is an apocalyptic number.

It is an amenable number.

133220101 is a deficient number, since it is larger than the sum of its proper divisors (19031451).

133220101 is an equidigital number, since it uses as much as digits as its factorization.

133220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19031450.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 133220101 is about 11542.1012385094. The cubic root of 133220101 is about 510.7282956292.

Adding to 133220101 its reverse (101022331), we get a palindrome (234242432).

The spelling of 133220101 in words is "one hundred thirty-three million, two hundred twenty thousand, one hundred one".