2220122221 has 4 divisors (see below), whose sum is σ = 2267358912. Its totient is φ = 2172885532.

The previous prime is 2220122213. The next prime is 2220122249. The reversal of 2220122221 is 1222210222.

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 2220122221 - 2³ = 2220122213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220122195 and 2220122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220122291) 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, 23618275 + ... + 23618368.

It is an arithmetic number, because the mean of its divisors is an integer number (566839728).

Almost surely, 2^2220122221 is an apocalyptic number.

It is an amenable number.

2220122221 is a deficient number, since it is larger than the sum of its proper divisors (47236691).

2220122221 is an equidigital number, since it uses as much as digits as its factorization.

2220122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47236690.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2220122221 is about 47118.1729378379. The cubic root of 2220122221 is about 1304.5446894956.

Adding to 2220122221 its reverse (1222210222), we get a palindrome (3442332443).

The spelling of 2220122221 in words is "two billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".