21302213213211 has 128 divisors (see below), whose sum is σ = 35212088088576. Its totient is φ = 11179457740800.

The previous prime is 21302213213189. The next prime is 21302213213231. The reversal of 21302213213211 is 11231231220312.

It is not a de Polignac number, because 21302213213211 - 2³¹ = 21300065729563 is a prime.

It is a super-2 number, since 2×21302213213211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21302213213231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5230101871 + ... + 5230105943.

It is an arithmetic number, because the mean of its divisors is an integer number (275094438192).

Almost surely, 2^{21302213213211} is an apocalyptic number.

21302213213211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21302213213211 is a deficient number, since it is larger than the sum of its proper divisors (13909874875365).

21302213213211 is a wasteful number, since it uses less digits than its factorization.

21302213213211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6261.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21302213213211 its reverse (11231231220312), we get a palindrome (32533444433523).

The spelling of 21302213213211 in words is "twenty-one trillion, three hundred two billion, two hundred thirteen million, two hundred thirteen thousand, two hundred eleven".