2421221311 has 4 divisors (see below), whose sum is σ = 2563646112. Its totient is φ = 2278796512.

The previous prime is 2421221279. The next prime is 2421221317. The reversal of 2421221311 is 1131221242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2421221311 - 2⁵ = 2421221279 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 (2421221317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71212375 + ... + 71212408.

It is an arithmetic number, because the mean of its divisors is an integer number (640911528).

Almost surely, 2^2421221311 is an apocalyptic number.

2421221311 is a deficient number, since it is larger than the sum of its proper divisors (142424801).

2421221311 is a wasteful number, since it uses less digits than its factorization.

2421221311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142424800.

The product of its digits is 192, while the sum is 19.

The square root of 2421221311 is about 49205.9072774804. The cubic root of 2421221311 is about 1342.8005050984.

Adding to 2421221311 its reverse (1131221242), we get a palindrome (3552442553).

The spelling of 2421221311 in words is "two billion, four hundred twenty-one million, two hundred twenty-one thousand, three hundred eleven".