21220213213338 has 16 divisors (see below), whose sum is σ = 42441333505920. Its totient is φ = 7073253224576.

The previous prime is 21220213213337. The next prime is 21220213213357. The reversal of 21220213213338 is 83331231202212.

It is a super-2 number, since 2×21220213213338² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220213213299 and 21220213213308.

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 7 ways as a sum of consecutive naturals, for example, 37490658 + ... + 38052461.

It is an arithmetic number, because the mean of its divisors is an integer number (2652583344120).

Almost surely, 2^{21220213213338} is an apocalyptic number.

21220213213338 is an abundant number, since it is smaller than the sum of its proper divisors (21221120292582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220213213338 is a wasteful number, since it uses less digits than its factorization.

21220213213338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75589941.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 21220213213338 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirteen million, two hundred thirteen thousand, three hundred thirty-eight".