221012133 has 8 divisors (see below), whose sum is σ = 296179488. Its totient is φ = 146593104.

The previous prime is 221012119. The next prime is 221012149. The reversal of 221012133 is 331210122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221012133 - 2⁶ = 221012069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186391 + ... + 187572.

It is an arithmetic number, because the mean of its divisors is an integer number (37022436).

Almost surely, 2^221012133 is an apocalyptic number.

It is an amenable number.

221012133 is a deficient number, since it is larger than the sum of its proper divisors (75167355).

221012133 is a wasteful number, since it uses less digits than its factorization.

221012133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374163.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221012133 is about 14866.4768186682. The cubic root of 221012133 is about 604.6054235668.

Adding to 221012133 its reverse (331210122), we get a palindrome (552222255).

The spelling of 221012133 in words is "two hundred twenty-one million, twelve thousand, one hundred thirty-three".