2220120101 has 4 divisors (see below), whose sum is σ = 2220264012. Its totient is φ = 2219976192.

The previous prime is 2220120073. The next prime is 2220120137. The reversal of 2220120101 is 1010210222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1801917601 + 418202500 = 42449^2 + 20450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220120101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220120191) 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 in 3 ways as a sum of consecutive naturals, for example, 45596 + ... + 80741.

It is an arithmetic number, because the mean of its divisors is an integer number (555066003).

Almost surely, 2^2220120101 is an apocalyptic number.

It is an amenable number.

2220120101 is a deficient number, since it is larger than the sum of its proper divisors (143911).

2220120101 is a wasteful number, since it uses less digits than its factorization.

2220120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143910.

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

The square root of 2220120101 is about 47118.1504412047. The cubic root of 2220120101 is about 1304.5442742579.

Adding to 2220120101 its reverse (1010210222), we get a palindrome (3230330323).

The spelling of 2220120101 in words is "two billion, two hundred twenty million, one hundred twenty thousand, one hundred one".