2241221421 has 4 divisors (see below), whose sum is σ = 2988295232. Its totient is φ = 1494147612.

The previous prime is 2241221371. The next prime is 2241221443. The reversal of 2241221421 is 1241221422.

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 not a de Polignac number, because 2241221421 - 2⁷ = 2241221293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2241229421) 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, 373536901 + ... + 373536906.

It is an arithmetic number, because the mean of its divisors is an integer number (747073808).

Almost surely, 2^2241221421 is an apocalyptic number.

It is an amenable number.

2241221421 is a deficient number, since it is larger than the sum of its proper divisors (747073811).

2241221421 is an equidigital number, since it uses as much as digits as its factorization.

2241221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747073810.

The product of its digits is 512, while the sum is 21.

The square root of 2241221421 is about 47341.5401207016. The cubic root of 2241221421 is about 1308.6642992607.

Adding to 2241221421 its reverse (1241221422), we get a palindrome (3482442843).

Subtracting from 2241221421 its reverse (1241221422), we obtain a palindrome (999999999).

The spelling of 2241221421 in words is "two billion, two hundred forty-one million, two hundred twenty-one thousand, four hundred twenty-one".