133221412 has 6 divisors (see below), whose sum is σ = 233137478. Its totient is φ = 66610704.

The previous prime is 133221409. The next prime is 133221427. The reversal of 133221412 is 214122331.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 82156096 + 51065316 = 9064^2 + 7146^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133221412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16652673 + ... + 16652680.

Almost surely, 2^133221412 is an apocalyptic number.

It is an amenable number.

133221412 is a deficient number, since it is larger than the sum of its proper divisors (99916066).

133221412 is a wasteful number, since it uses less digits than its factorization.

133221412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33305357 (or 33305355 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 133221412 is about 11542.1580304551. The cubic root of 133221412 is about 510.7299709585.

Adding to 133221412 its reverse (214122331), we get a palindrome (347343743).

The spelling of 133221412 in words is "one hundred thirty-three million, two hundred twenty-one thousand, four hundred twelve".