133141221 has 6 divisors (see below), whose sum is σ = 192315110. Its totient is φ = 88760808.

The previous prime is 133141219. The next prime is 133141279. The reversal of 133141221 is 122141331.

It can be written as a sum of positive squares in only one way, i.e., 78588225 + 54552996 = 8865^2 + 7386^2 .

It is not a de Polignac number, because 133141221 - 2¹ = 133141219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133141194 and 133141203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133140221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7396726 + ... + 7396743.

Almost surely, 2^133141221 is an apocalyptic number.

It is an amenable number.

133141221 is a deficient number, since it is larger than the sum of its proper divisors (59173889).

133141221 is a wasteful number, since it uses less digits than its factorization.

133141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14793475 (or 14793472 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 133141221 is about 11538.6836770925. The cubic root of 133141221 is about 510.6274745032.

Adding to 133141221 its reverse (122141331), we get a palindrome (255282552).

It can be divided in two parts, 13314 and 1221, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 133141221 in words is "one hundred thirty-three million, one hundred forty-one thousand, two hundred twenty-one".