2421121213 has 6 divisors (see below), whose sum is σ = 2816406366. Its totient is φ = 2075246712.

The previous prime is 2421121211. The next prime is 2421121223. The reversal of 2421121213 is 3121211242.

It can be written as a sum of positive squares in only one way, i.e., 2377732644 + 43388569 = 48762^2 + 6587^2 .

It is not a de Polignac number, because 2421121213 - 2¹ = 2421121211 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 (2421121211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24705270 + ... + 24705367.

It is an arithmetic number, because the mean of its divisors is an integer number (469401061).

Almost surely, 2^2421121213 is an apocalyptic number.

It is an amenable number.

2421121213 is a deficient number, since it is larger than the sum of its proper divisors (395285153).

2421121213 is an equidigital number, since it uses as much as digits as its factorization.

2421121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49410651 (or 49410644 counting only the distinct ones).

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

The square root of 2421121213 is about 49204.8901329939. The cubic root of 2421121213 is about 1342.7820001816.

Adding to 2421121213 its reverse (3121211242), we get a palindrome (5542332455).

The spelling of 2421121213 in words is "two billion, four hundred twenty-one million, one hundred twenty-one thousand, two hundred thirteen".