2420020221 has 4 divisors (see below), whose sum is σ = 3226693632. Its totient is φ = 1613346812.

The previous prime is 2420020219. The next prime is 2420020223. The reversal of 2420020221 is 1220200242.

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 an interprime number because it is at equal distance from previous prime (2420020219) and next prime (2420020223).

It is a cyclic number.

It is not a de Polignac number, because 2420020221 - 2¹ = 2420020219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2420020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2420020223) 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, 403336701 + ... + 403336706.

It is an arithmetic number, because the mean of its divisors is an integer number (806673408).

Almost surely, 2^2420020221 is an apocalyptic number.

It is an amenable number.

2420020221 is a deficient number, since it is larger than the sum of its proper divisors (806673411).

2420020221 is an equidigital number, since it uses as much as digits as its factorization.

2420020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806673410.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2420020221 is about 49193.7010297050. The cubic root of 2420020221 is about 1342.5784283288.

Adding to 2420020221 its reverse (1220200242), we get a palindrome (3640220463).

The spelling of 2420020221 in words is "two billion, four hundred twenty million, twenty thousand, two hundred twenty-one".