21220103230320 has 40 divisors (see below), whose sum is σ = 65782320014736. Its totient is φ = 5658694194688.

The previous prime is 21220103230237. The next prime is 21220103230327. The reversal of 21220103230320 is 2303230102212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×21220103230320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220103230327) 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, 44208548157 + ... + 44208548636.

Almost surely, 2^{21220103230320} is an apocalyptic number.

21220103230320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220103230320 is an abundant number, since it is smaller than the sum of its proper divisors (44562216784416).

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

21220103230320 is a wasteful number, since it uses less digits than its factorization.

21220103230320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88417096809 (or 88417096803 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21220103230320 its reverse (2303230102212), we get a palindrome (23523333332532).

The spelling of 21220103230320 in words is "twenty-one trillion, two hundred twenty billion, one hundred three million, two hundred thirty thousand, three hundred twenty".