2245120421 has 4 divisors (see below), whose sum is σ = 2249808000. Its totient is φ = 2240432844.

The previous prime is 2245120403. The next prime is 2245120457. The reversal of 2245120421 is 1240215422.

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 2245120421 - 2¹⁸ = 2244858277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2245120481) 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, 2343071 + ... + 2344028.

It is an arithmetic number, because the mean of its divisors is an integer number (562452000).

Almost surely, 2^2245120421 is an apocalyptic number.

It is an amenable number.

2245120421 is a deficient number, since it is larger than the sum of its proper divisors (4687579).

2245120421 is an equidigital number, since it uses as much as digits as its factorization.

2245120421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687578.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2245120421 is about 47382.7017064245. The cubic root of 2245120421 is about 1309.4227437443.

Adding to 2245120421 its reverse (1240215422), we get a palindrome (3485335843).

The spelling of 2245120421 in words is "two billion, two hundred forty-five million, one hundred twenty thousand, four hundred twenty-one".