21301021002220 has 12 divisors (see below), whose sum is σ = 44732144104704. Its totient is φ = 8520408400880.

The previous prime is 21301021002187. The next prime is 21301021002227. The reversal of 21301021002220 is 2220012010312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21301021002194 and 21301021002203.

It is not an unprimeable number, because it can be changed into a prime (21301021002227) 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, 532525525036 + ... + 532525525075.

It is an arithmetic number, because the mean of its divisors is an integer number (3727678675392).

Almost surely, 2^{21301021002220} is an apocalyptic number.

21301021002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301021002220 is an abundant number, since it is smaller than the sum of its proper divisors (23431123102484).

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

21301021002220 is a wasteful number, since it uses less digits than its factorization.

21301021002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065051050120 (or 1065051050118 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21301021002220 its reverse (2220012010312), we get a palindrome (23521033012532).

The spelling of 21301021002220 in words is "twenty-one trillion, three hundred one billion, twenty-one million, two thousand, two hundred twenty".