213213311021 has 8 divisors (see below), whose sum is σ = 213331060800. Its totient is φ = 213095600032.

The previous prime is 213213310997. The next prime is 213213311027. The reversal of 213213311021 is 120113312312.

It is a happy number.

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 213213311021 - 2¹⁰ = 213213309997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213213310984 and 213213311002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213213311027) 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, 25309016 + ... + 25317438.

It is an arithmetic number, because the mean of its divisors is an integer number (26666382600).

Almost surely, 2^213213311021 is an apocalyptic number.

It is an amenable number.

213213311021 is a deficient number, since it is larger than the sum of its proper divisors (117749779).

213213311021 is an equidigital number, since it uses as much as digits as its factorization.

213213311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19395.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213213311021 its reverse (120113312312), we get a palindrome (333326623333).

The spelling of 213213311021 in words is "two hundred thirteen billion, two hundred thirteen million, three hundred eleven thousand, twenty-one".