21300001213 has 4 divisors (see below), whose sum is σ = 21304653408. Its totient is φ = 21295349020.

The previous prime is 21300001211. The next prime is 21300001231. The reversal of 21300001213 is 31210000312.

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 21300001213 - 2¹ = 21300001211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21300001193 and 21300001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300001211) 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, 2319223 + ... + 2328388.

It is an arithmetic number, because the mean of its divisors is an integer number (5326163352).

Almost surely, 2^21300001213 is an apocalyptic number.

It is an amenable number.

21300001213 is a deficient number, since it is larger than the sum of its proper divisors (4652195).

21300001213 is an equidigital number, since it uses as much as digits as its factorization.

21300001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652194.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21300001213 its reverse (31210000312), we get a palindrome (52510001525).

Subtracting 21300001213 from its reverse (31210000312), we obtain a palindrome (9909999099).

The spelling of 21300001213 in words is "twenty-one billion, three hundred million, one thousand, two hundred thirteen".