221133001 has 4 divisors (see below), whose sum is σ = 232771600. Its totient is φ = 209494404.

The previous prime is 221132993. The next prime is 221133061. The reversal of 221133001 is 100331122.

221133001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 100331122 = 2 ⋅50165561.

It is a cyclic number.

It is not a de Polignac number, because 221133001 - 2³ = 221132993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221133061) 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, 5819271 + ... + 5819308.

It is an arithmetic number, because the mean of its divisors is an integer number (58192900).

Almost surely, 2^221133001 is an apocalyptic number.

It is an amenable number.

221133001 is a deficient number, since it is larger than the sum of its proper divisors (11638599).

221133001 is a wasteful number, since it uses less digits than its factorization.

221133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11638598.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 221133001 is about 14870.5413822093. The cubic root of 221133001 is about 604.7156198258.

Adding to 221133001 its reverse (100331122), we get a palindrome (321464123).

The spelling of 221133001 in words is "two hundred twenty-one million, one hundred thirty-three thousand, one".