21130241213 has 2 divisors, whose sum is σ = 21130241214. Its totient is φ = 21130241212.

The previous prime is 21130241191. The next prime is 21130241257. The reversal of 21130241213 is 31214203112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20597416324 + 532824889 = 143518^2 + 23083^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130241213 - 2⁶ = 21130241149 is a prime.

It is a super-2 number, since 2×21130241213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130241113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565120606 + 10565120607.

It is an arithmetic number, because the mean of its divisors is an integer number (10565120607).

Almost surely, 2^21130241213 is an apocalyptic number.

It is an amenable number.

21130241213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130241213 is an equidigital number, since it uses as much as digits as its factorization.

21130241213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21130241213 its reverse (31214203112), we get a palindrome (52344444325).

The spelling of 21130241213 in words is "twenty-one billion, one hundred thirty million, two hundred forty-one thousand, two hundred thirteen".