21321310203213 has 8 divisors (see below), whose sum is σ = 28429255588800. Its totient is φ = 14213785809888.

The previous prime is 21321310203211. The next prime is 21321310203311. The reversal of 21321310203213 is 31230201312312.

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

It is not a de Polignac number, because 21321310203213 - 2¹ = 21321310203211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321310203211) 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, 105129873 + ... + 105332486.

It is an arithmetic number, because the mean of its divisors is an integer number (3553656948600).

Almost surely, 2^{21321310203213} is an apocalyptic number.

It is an amenable number.

21321310203213 is a deficient number, since it is larger than the sum of its proper divisors (7107945385587).

21321310203213 is a wasteful number, since it uses less digits than its factorization.

21321310203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210496131.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21321310203213 its reverse (31230201312312), we get a palindrome (52551511515525).

The spelling of 21321310203213 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred ten million, two hundred three thousand, two hundred thirteen".