133022221 has 4 divisors (see below), whose sum is σ = 133138944. Its totient is φ = 132905500.

The previous prime is 133022203. The next prime is 133022237. The reversal of 133022221 is 122220331.

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: 122220331 = 19 ⋅6432649.

It is a cyclic number.

It is not a de Polignac number, because 133022221 - 2⁹ = 133021709 is a prime.

It is a super-2 number, since 2×133022221² = 35389822559545682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133022195 and 133022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133022251) 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, 56635 + ... + 58936.

It is an arithmetic number, because the mean of its divisors is an integer number (33284736).

Almost surely, 2^133022221 is an apocalyptic number.

It is an amenable number.

133022221 is a deficient number, since it is larger than the sum of its proper divisors (116723).

133022221 is a wasteful number, since it uses less digits than its factorization.

133022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116722.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 133022221 is about 11533.5259569656. The cubic root of 133022221 is about 510.4752982861.

Adding to 133022221 its reverse (122220331), we get a palindrome (255242552).

The spelling of 133022221 in words is "one hundred thirty-three million, twenty-two thousand, two hundred twenty-one".