2421122213 has 4 divisors (see below), whose sum is σ = 2430543180. Its totient is φ = 2411701248.

The previous prime is 2421122153. The next prime is 2421122239. The reversal of 2421122213 is 3122211242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1583482849 + 837639364 = 39793^2 + 28942^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421122213 - 2¹⁸ = 2420860069 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 (2421182213) 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, 4710098 + ... + 4710611.

It is an arithmetic number, because the mean of its divisors is an integer number (607635795).

Almost surely, 2^2421122213 is an apocalyptic number.

It is an amenable number.

2421122213 is a deficient number, since it is larger than the sum of its proper divisors (9420967).

2421122213 is an equidigital number, since it uses as much as digits as its factorization.

2421122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9420966.

The product of its digits is 384, while the sum is 20.

The square root of 2421122213 is about 49204.9002945845. The cubic root of 2421122213 is about 1342.7821850521.

Adding to 2421122213 its reverse (3122211242), we get a palindrome (5543333455).

The spelling of 2421122213 in words is "two billion, four hundred twenty-one million, one hundred twenty-two thousand, two hundred thirteen".