21020212330000 has 100 divisors (see below), whose sum is σ = 54806808416668. Its totient is φ = 7761309120000.

The previous prime is 21020212329971. The next prime is 21020212330099. The reversal of 21020212330000 is 3321202012.

It can be written as a sum of positive squares in 10 ways, for example, as 15852246694144 + 5167965635856 = 3981488^2 + 2273316^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80716971 + ... + 80976970.

Almost surely, 2^{21020212330000} is an apocalyptic number.

21020212330000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020212330000 is an abundant number, since it is smaller than the sum of its proper divisors (33786596086668).

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

21020212330000 is a wasteful number, since it uses less digits than its factorization.

21020212330000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161693982 (or 161693961 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21020212330000 its reverse (3321202012), we get a palindrome (21023533532012).

The spelling of 21020212330000 in words is "twenty-one trillion, twenty billion, two hundred twelve million, three hundred thirty thousand".