133221011 has 32 divisors (see below), whose sum is σ = 170989056. Its totient is φ = 100800000.

The previous prime is 133220987. The next prime is 133221017. The reversal of 133221011 is 110122331.

It is a de Polignac number, because none of the positive numbers 2^k-133221011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133221017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530636 + ... + 530886.

It is an arithmetic number, because the mean of its divisors is an integer number (5343408).

Almost surely, 2^133221011 is an apocalyptic number.

133221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133221011 is a deficient number, since it is larger than the sum of its proper divisors (37768045).

133221011 is a wasteful number, since it uses less digits than its factorization.

133221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 133221011 is about 11542.1406593405. The cubic root of 133221011 is about 510.7294585210.

Adding to 133221011 its reverse (110122331), we get a palindrome (243343342).

The spelling of 133221011 in words is "one hundred thirty-three million, two hundred twenty-one thousand, eleven".