220121144 has 16 divisors (see below), whose sum is σ = 412927800. Its totient is φ = 110007072.

The previous prime is 220121141. The next prime is 220121147. The reversal of 220121144 is 441121022.

It is an interprime number because it is at equal distance from previous prime (220121141) and next prime (220121147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121141) 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, 14894 + ... + 25730.

Almost surely, 2^220121144 is an apocalyptic number.

It is an amenable number.

220121144 is a deficient number, since it is larger than the sum of its proper divisors (192806656).

220121144 is a wasteful number, since it uses less digits than its factorization.

220121144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13382 (or 13378 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 220121144 is about 14836.4801755672. The cubic root of 220121144 is about 603.7918599230.

Adding to 220121144 its reverse (441121022), we get a palindrome (661242166).

The spelling of 220121144 in words is "two hundred twenty million, one hundred twenty-one thousand, one hundred forty-four".