2421251321 has 4 divisors (see below), whose sum is σ = 2421421392. Its totient is φ = 2421081252.

The previous prime is 2421251309. The next prime is 2421251323. The reversal of 2421251321 is 1231521242.

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 2421251321 - 2⁶ = 2421251257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421251323) 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, 61511 + ... + 92876.

It is an arithmetic number, because the mean of its divisors is an integer number (605355348).

Almost surely, 2^2421251321 is an apocalyptic number.

It is an amenable number.

2421251321 is a deficient number, since it is larger than the sum of its proper divisors (170071).

2421251321 is a wasteful number, since it uses less digits than its factorization.

2421251321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170070.

The product of its digits is 960, while the sum is 23.

The square root of 2421251321 is about 49206.2122195968. The cubic root of 2421251321 is about 1342.8060528877.

Adding to 2421251321 its reverse (1231521242), we get a palindrome (3652772563).

The spelling of 2421251321 in words is "two billion, four hundred twenty-one million, two hundred fifty-one thousand, three hundred twenty-one".