21210233213 has 8 divisors (see below), whose sum is σ = 22843154208. Its totient is φ = 19577507184.

The previous prime is 21210233189. The next prime is 21210233279. The reversal of 21210233213 is 31233201212.

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 21210233213 - 2¹⁴ = 21210216829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210233113) 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, 241070 + ... + 317072.

It is an arithmetic number, because the mean of its divisors is an integer number (2855394276).

Almost surely, 2^21210233213 is an apocalyptic number.

It is an amenable number.

21210233213 is a deficient number, since it is larger than the sum of its proper divisors (1632920995).

21210233213 is a wasteful number, since it uses less digits than its factorization.

21210233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97483.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21210233213 its reverse (31233201212), we get a palindrome (52443434425).

The spelling of 21210233213 in words is "twenty-one billion, two hundred ten million, two hundred thirty-three thousand, two hundred thirteen".