21210302213 has 8 divisors (see below), whose sum is σ = 21325252608. Its totient is φ = 21095663184.

The previous prime is 21210302189. The next prime is 21210302251. The reversal of 21210302213 is 31220301212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21210302213 - 2¹⁴ = 21210285829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210302191 and 21210302200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210302413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59420 + ... + 214362.

It is an arithmetic number, because the mean of its divisors is an integer number (2665656576).

Almost surely, 2^21210302213 is an apocalyptic number.

It is an amenable number.

21210302213 is a deficient number, since it is larger than the sum of its proper divisors (114950395).

21210302213 is a wasteful number, since it uses less digits than its factorization.

21210302213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155683.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21210302213 its reverse (31220301212), we get a palindrome (52430603425).

The spelling of 21210302213 in words is "twenty-one billion, two hundred ten million, three hundred two thousand, two hundred thirteen".