220450121 has 4 divisors (see below), whose sum is σ = 225576912. Its totient is φ = 215323332.

The previous prime is 220450091. The next prime is 220450123. The reversal of 220450121 is 121054022.

220450121 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.

It is a cyclic number.

It is not a de Polignac number, because 220450121 - 2¹⁴ = 220433737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220450121.

It is not an unprimeable number, because it can be changed into a prime (220450123) 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, 2563331 + ... + 2563416.

It is an arithmetic number, because the mean of its divisors is an integer number (56394228).

Almost surely, 2^220450121 is an apocalyptic number.

It is an amenable number.

220450121 is a deficient number, since it is larger than the sum of its proper divisors (5126791).

220450121 is an equidigital number, since it uses as much as digits as its factorization.

220450121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126790.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 220450121 is about 14847.5627966343. The cubic root of 220450121 is about 604.0925046176.

It can be divided in two parts, 2204 and 50121, that added together give a palindrome (52325).

The spelling of 220450121 in words is "two hundred twenty million, four hundred fifty thousand, one hundred twenty-one".