21213362164211 has 4 divisors (see below), whose sum is σ = 24243842473392. Its totient is φ = 18182881855032.

The previous prime is 21213362164193. The next prime is 21213362164223. The reversal of 21213362164211 is 11246126331212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21213362164211 - 2¹⁰ = 21213362163187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213362164411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515240154580 + ... + 1515240154593.

It is an arithmetic number, because the mean of its divisors is an integer number (6060960618348).

Almost surely, 2^{21213362164211} is an apocalyptic number.

21213362164211 is a deficient number, since it is larger than the sum of its proper divisors (3030480309181).

21213362164211 is an equidigital number, since it uses as much as digits as its factorization.

21213362164211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030480309180.

The product of its digits is 20736, while the sum is 35.

Adding to 21213362164211 its reverse (11246126331212), we get a palindrome (32459488495423).

The spelling of 21213362164211 in words is "twenty-one trillion, two hundred thirteen billion, three hundred sixty-two million, one hundred sixty-four thousand, two hundred eleven".