220120121 has 8 divisors (see below), whose sum is σ = 245227080. Its totient is φ = 196180992.

The previous prime is 220120081. The next prime is 220120127. The reversal of 220120121 is 121021022.

It is a happy number.

220120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13225 + 220106896 = 115^2 + 14836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220120127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291560 + ... + 292313.

It is an arithmetic number, because the mean of its divisors is an integer number (30653385).

Almost surely, 2^220120121 is an apocalyptic number.

It is an amenable number.

220120121 is a deficient number, since it is larger than the sum of its proper divisors (25106959).

220120121 is a wasteful number, since it uses less digits than its factorization.

220120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583915.

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

The square root of 220120121 is about 14836.4456996951. The cubic root of 220120121 is about 603.7909245592.

Adding to 220120121 its reverse (121021022), we get a palindrome (341141143).

Subtracting from 220120121 its reverse (121021022), we obtain a palindrome (99099099).

It can be divided in two parts, 2201 and 20121, that added together give a palindrome (22322).

The spelling of 220120121 in words is "two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".