220121120 has 24 divisors (see below), whose sum is σ = 520036524. Its totient is φ = 88048384.

The previous prime is 220121093. The next prime is 220121141. The reversal of 220121120 is 21121022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 205406224 + 14714896 = 14332^2 + 3836^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 687719 + ... + 688038.

Almost surely, 2^220121120 is an apocalyptic number.

220121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121120 is an abundant number, since it is smaller than the sum of its proper divisors (299915404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220121120 is a wasteful number, since it uses less digits than its factorization.

220121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375772 (or 1375764 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 220121120 is about 14836.4793667501. The cubic root of 220121120 is about 603.7918379790.

Adding to 220121120 its reverse (21121022), we get a palindrome (241242142).

It can be divided in two parts, 22012 and 1120, that added together give a palindrome (23132).

The spelling of 220121120 in words is "two hundred twenty million, one hundred twenty-one thousand, one hundred twenty".