21303100221320 has 64 divisors (see below), whose sum is σ = 48258473803200. Its totient is φ = 8463311944960.

The previous prime is 21303100221281. The next prime is 21303100221349. The reversal of 21303100221320 is 2312200130312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21303100221292 and 21303100221301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4066367 + ... + 7690353.

It is an arithmetic number, because the mean of its divisors is an integer number (754038653175).

Almost surely, 2^{21303100221320} is an apocalyptic number.

21303100221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303100221320 is an abundant number, since it is smaller than the sum of its proper divisors (26955373581880).

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

21303100221320 is a wasteful number, since it uses less digits than its factorization.

21303100221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624998 (or 3624994 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21303100221320 its reverse (2312200130312), we get a palindrome (23615300351632).

The spelling of 21303100221320 in words is "twenty-one trillion, three hundred three billion, one hundred million, two hundred twenty-one thousand, three hundred twenty".