2220421001 has 4 divisors (see below), whose sum is σ = 2220697104. Its totient is φ = 2220144900.

The previous prime is 2220420977. The next prime is 2220421003. The reversal of 2220421001 is 1001240222.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1001240222 = 2 ⋅500620111.

It is a cyclic number.

It is not a de Polignac number, because 2220421001 - 2²⁶ = 2153312137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220421003) 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, 125615 + ... + 142196.

It is an arithmetic number, because the mean of its divisors is an integer number (555174276).

Almost surely, 2^2220421001 is an apocalyptic number.

It is an amenable number.

2220421001 is a deficient number, since it is larger than the sum of its proper divisors (276103).

2220421001 is an equidigital number, since it uses as much as digits as its factorization.

2220421001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276102.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2220421001 is about 47121.3433700696. The cubic root of 2220421001 is about 1304.6032079524.

Adding to 2220421001 its reverse (1001240222), we get a palindrome (3221661223).

The spelling of 2220421001 in words is "two billion, two hundred twenty million, four hundred twenty-one thousand, one".