21220302213 has 32 divisors (see below), whose sum is σ = 34405862400. Its totient is φ = 12819380400.

The previous prime is 21220302203. The next prime is 21220302217. The reversal of 21220302213 is 31220302212.

It is not a de Polignac number, because 21220302213 - 2⁶ = 21220302149 is a prime.

It is a super-2 number, since 2×21220302213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220302217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22503 + ... + 207236.

It is an arithmetic number, because the mean of its divisors is an integer number (1075183200).

Almost surely, 2^21220302213 is an apocalyptic number.

It is an amenable number.

21220302213 is a deficient number, since it is larger than the sum of its proper divisors (13185560187).

21220302213 is a wasteful number, since it uses less digits than its factorization.

21220302213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230070 (or 230064 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21220302213 its reverse (31220302212), we get a palindrome (52440604425).

Subtracting 21220302213 from its reverse (31220302212), we obtain a palindrome (9999999999).

The spelling of 21220302213 in words is "twenty-one billion, two hundred twenty million, three hundred two thousand, two hundred thirteen".