221133023 has 4 divisors (see below), whose sum is σ = 221367480. Its totient is φ = 220898568.

The previous prime is 221132993. The next prime is 221133061. The reversal of 221133023 is 320331122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221133023 - 2⁶ = 221132959 is a prime.

It is a super-2 number, since 2×221133023² = 97799627722237058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221132992 and 221133010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221133083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115808 + ... + 117701.

It is an arithmetic number, because the mean of its divisors is an integer number (55341870).

Almost surely, 2^221133023 is an apocalyptic number.

221133023 is a deficient number, since it is larger than the sum of its proper divisors (234457).

221133023 is an equidigital number, since it uses as much as digits as its factorization.

221133023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234456.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 221133023 is about 14870.5421219268. The cubic root of 221133023 is about 604.7156398797.

Adding to 221133023 its reverse (320331122), we get a palindrome (541464145).

The spelling of 221133023 in words is "two hundred twenty-one million, one hundred thirty-three thousand, twenty-three".