21130013213 has 4 divisors (see below), whose sum is σ = 21327490080. Its totient is φ = 20932536348.

The previous prime is 21130013209. The next prime is 21130013237. The reversal of 21130013213 is 31231003112.

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 21130013213 - 2² = 21130013209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130013191 and 21130013200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130018213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98738273 + ... + 98738486.

It is an arithmetic number, because the mean of its divisors is an integer number (5331872520).

Almost surely, 2^21130013213 is an apocalyptic number.

It is an amenable number.

21130013213 is a deficient number, since it is larger than the sum of its proper divisors (197476867).

21130013213 is a wasteful number, since it uses less digits than its factorization.

21130013213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197476866.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21130013213 its reverse (31231003112), we get a palindrome (52361016325).

The spelling of 21130013213 in words is "twenty-one billion, one hundred thirty million, thirteen thousand, two hundred thirteen".