21100033303320 has 256 divisors, whose sum is σ = 65902614768000. Its totient is φ = 5399814537216.

The previous prime is 21100033303253. The next prime is 21100033303331. The reversal of 21100033303320 is 2330333000112.

It is a super-2 number, since 2×21100033303320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 161555164 + ... + 161685716.

Almost surely, 2^{21100033303320} is an apocalyptic number.

21100033303320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100033303320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32951307384000).

21100033303320 is an abundant number, since it is smaller than the sum of its proper divisors (44802581464680).

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

21100033303320 is a wasteful number, since it uses less digits than its factorization.

21100033303320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131102 (or 131098 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21100033303320 its reverse (2330333000112), we get a palindrome (23430366303432).

The spelling of 21100033303320 in words is "twenty-one trillion, one hundred billion, thirty-three million, three hundred three thousand, three hundred twenty".