220455121 has 4 divisors (see below), whose sum is σ = 221500144. Its totient is φ = 219410100.

The previous prime is 220455107. The next prime is 220455127. The reversal of 220455121 is 121554022.

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 220455121 - 2⁵ = 220455089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220455092 and 220455101.

It is not an unprimeable number, because it can be changed into a prime (220455127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522195 + ... + 522616.

It is an arithmetic number, because the mean of its divisors is an integer number (55375036).

Almost surely, 2^220455121 is an apocalyptic number.

It is an amenable number.

220455121 is a deficient number, since it is larger than the sum of its proper divisors (1045023).

220455121 is a wasteful number, since it uses less digits than its factorization.

220455121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045022.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 220455121 is about 14847.7311734824. The cubic root of 220455121 is about 604.0970716971.

The spelling of 220455121 in words is "two hundred twenty million, four hundred fifty-five thousand, one hundred twenty-one".