220445121 has 12 divisors (see below), whose sum is σ = 318276528. Its totient is φ = 135658224.

The previous prime is 220445117. The next prime is 220445143. The reversal of 220445121 is 121544022.

220445121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220445121 - 2² = 220445117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220445161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216895 + ... + 217908.

It is an arithmetic number, because the mean of its divisors is an integer number (26523044).

Almost surely, 2^220445121 is an apocalyptic number.

It is an amenable number.

220445121 is a deficient number, since it is larger than the sum of its proper divisors (97831407).

220445121 is a wasteful number, since it uses less digits than its factorization.

220445121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434832 (or 434819 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 220445121 is about 14847.3944178768. The cubic root of 220445121 is about 604.0879374690.

Adding to 220445121 its reverse (121544022), we get a palindrome (341989143).

The spelling of 220445121 in words is "two hundred twenty million, four hundred forty-five thousand, one hundred twenty-one".