21220213213336 has 16 divisors (see below), whose sum is σ = 39839639578200. Its totient is φ = 10596309325824.

The previous prime is 21220213213307. The next prime is 21220213213337. The reversal of 21220213213336 is 63331231202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220213213298 and 21220213213307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220213213337) 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, 1724653570 + ... + 1724665873.

Almost surely, 2^{21220213213336} is an apocalyptic number.

It is an amenable number.

21220213213336 is a deficient number, since it is larger than the sum of its proper divisors (18619426364864).

21220213213336 is a wasteful number, since it uses less digits than its factorization.

21220213213336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449320218 (or 3449320214 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 21220213213336 its reverse (63331231202212), we get a palindrome (84551444415548).

The spelling of 21220213213336 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirteen million, two hundred thirteen thousand, three hundred thirty-six".