2220454121 has 4 divisors (see below), whose sum is σ = 2242012032. Its totient is φ = 2198896212.

The previous prime is 2220454073. The next prime is 2220454123. The reversal of 2220454121 is 1214540222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2220454121 - 2¹⁸ = 2220191977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220454123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10778801 + ... + 10779006.

It is an arithmetic number, because the mean of its divisors is an integer number (560503008).

Almost surely, 2^2220454121 is an apocalyptic number.

It is an amenable number.

2220454121 is a deficient number, since it is larger than the sum of its proper divisors (21557911).

2220454121 is a wasteful number, since it uses less digits than its factorization.

2220454121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21557910.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2220454121 is about 47121.6948018638. The cubic root of 2220454121 is about 1304.6096944466.

Adding to 2220454121 its reverse (1214540222), we get a palindrome (3434994343).

The spelling of 2220454121 in words is "two billion, two hundred twenty million, four hundred fifty-four thousand, one hundred twenty-one".