21110333021220 has 48 divisors (see below), whose sum is σ = 61678886048640. Its totient is φ = 5384664654336.

The previous prime is 21110333021161. The next prime is 21110333021221. The reversal of 21110333021220 is 2212033301112.

It is not an unprimeable number, because it can be changed into a prime (21110333021221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7648670005 + ... + 7648672764.

It is an arithmetic number, because the mean of its divisors is an integer number (1284976792680).

Almost surely, 2^{21110333021220} is an apocalyptic number.

21110333021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110333021220 is an abundant number, since it is smaller than the sum of its proper divisors (40568553027420).

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

21110333021220 is a wasteful number, since it uses less digits than its factorization.

21110333021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15297342804 (or 15297342802 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21110333021220 its reverse (2212033301112), we get a palindrome (23322366322332).

The spelling of 21110333021220 in words is "twenty-one trillion, one hundred ten billion, three hundred thirty-three million, twenty-one thousand, two hundred twenty".