21214320013 has 2 divisors, whose sum is σ = 21214320014. Its totient is φ = 21214320012.

The previous prime is 21214320007. The next prime is 21214320019. The reversal of 21214320013 is 31002341212.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (21214320007) and next prime (21214320019).

It can be written as a sum of positive squares in only one way, i.e., 16302693124 + 4911626889 = 127682^2 + 70083^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214320013 - 2⁵ = 21214319981 is a prime.

It is a super-2 number, since 2×21214320013² (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 (21214320019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607160006 + 10607160007.

It is an arithmetic number, because the mean of its divisors is an integer number (10607160007).

Almost surely, 2^21214320013 is an apocalyptic number.

It is an amenable number.

21214320013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214320013 is an equidigital number, since it uses as much as digits as its factorization.

21214320013 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 19.

Adding to 21214320013 its reverse (31002341212), we get a palindrome (52216661225).

The spelling of 21214320013 in words is "twenty-one billion, two hundred fourteen million, three hundred twenty thousand, thirteen".