21213330002020 has 96 divisors (see below), whose sum is σ = 50087750727168. Its totient is φ = 7488005471232.

The previous prime is 21213330001973. The next prime is 21213330002021. The reversal of 21213330002020 is 2020003331212.

It is a super-4 number, since 4×21213330002020⁴ (a number of 54 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21213330002021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10084752 + ... + 12005368.

It is an arithmetic number, because the mean of its divisors is an integer number (521747403408).

Almost surely, 2^{21213330002020} is an apocalyptic number.

21213330002020 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 21213330002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25043875363584).

21213330002020 is an abundant number, since it is smaller than the sum of its proper divisors (28874420725148).

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

21213330002020 is a wasteful number, since it uses less digits than its factorization.

21213330002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922509 (or 1922507 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21213330002020 its reverse (2020003331212), we get a palindrome (23233333333232).

The spelling of 21213330002020 in words is "twenty-one trillion, two hundred thirteen billion, three hundred thirty million, two thousand, twenty".