2420220221 has 4 divisors (see below), whose sum is σ = 2450856000. Its totient is φ = 2389584444.

The previous prime is 2420220211. The next prime is 2420220223. The reversal of 2420220221 is 1220220242.

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 2420220221 - 2¹⁴ = 2420203837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2420220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2420220223) 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, 15317771 + ... + 15317928.

It is an arithmetic number, because the mean of its divisors is an integer number (612714000).

Almost surely, 2^2420220221 is an apocalyptic number.

It is an amenable number.

2420220221 is a deficient number, since it is larger than the sum of its proper divisors (30635779).

2420220221 is an equidigital number, since it uses as much as digits as its factorization.

2420220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30635778.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2420220221 is about 49195.7337682852. The cubic root of 2420220221 is about 1342.6154126325.

Adding to 2420220221 its reverse (1220220242), we get a palindrome (3640440463).

The spelling of 2420220221 in words is "two billion, four hundred twenty million, two hundred twenty thousand, two hundred twenty-one".