220633121 has 4 divisors (see below), whose sum is σ = 220739652. Its totient is φ = 220526592.

The previous prime is 220633103. The next prime is 220633141. The reversal of 220633121 is 121336022.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10962721 + 209670400 = 3311^2 + 14480^2 .

It is a cyclic number.

It is not a de Polignac number, because 220633121 - 2⁶ = 220633057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220633093 and 220633102.

It is not an unprimeable number, because it can be changed into a prime (220633141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50096 + ... + 54321.

It is an arithmetic number, because the mean of its divisors is an integer number (55184913).

Almost surely, 2^220633121 is an apocalyptic number.

It is an amenable number.

220633121 is a deficient number, since it is larger than the sum of its proper divisors (106531).

220633121 is a wasteful number, since it uses less digits than its factorization.

220633121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106530.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 220633121 is about 14853.7241458161. The cubic root of 220633121 is about 604.2596147592.

Adding to 220633121 its reverse (121336022), we get a palindrome (341969143).

The spelling of 220633121 in words is "two hundred twenty million, six hundred thirty-three thousand, one hundred twenty-one".