220121344 has 18 divisors (see below), whose sum is σ = 439383350. Its totient is φ = 110060544.

The previous prime is 220121309. The next prime is 220121347. The reversal of 220121344 is 443121022.

It can be written as a sum of positive squares in only one way, i.e., 127961344 + 92160000 = 11312^2 + 9600^2 .

It is not an unprimeable number, because it can be changed into a prime (220121347) 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 as a sum of consecutive naturals, namely, 429669 + ... + 430180.

Almost surely, 2^220121344 is an apocalyptic number.

It is an amenable number.

220121344 is a deficient number, since it is larger than the sum of its proper divisors (219262006).

220121344 is an frugal number, since it uses more digits than its factorization.

220121344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859865 (or 859851 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 220121344 is about 14836.4869157089. The cubic root of 220121344 is about 603.7920427895.

Adding to 220121344 its reverse (443121022), we get a palindrome (663242366).

The spelling of 220121344 in words is "two hundred twenty million, one hundred twenty-one thousand, three hundred forty-four".