212333020020 has 144 divisors (see below), whose sum is σ = 702917429760. Its totient is φ = 51453561600.

The previous prime is 212333019991. The next prime is 212333020043. The reversal of 212333020020 is 20020333212.

It is a happy number.

It is a super-2 number, since 2×212333020020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212333019975 and 212333020002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5109486 + ... + 5150874.

It is an arithmetic number, because the mean of its divisors is an integer number (4881371040).

Almost surely, 2^212333020020 is an apocalyptic number.

212333020020 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 212333020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351458714880).

212333020020 is an abundant number, since it is smaller than the sum of its proper divisors (490584409740).

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

212333020020 is a wasteful number, since it uses less digits than its factorization.

212333020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44006 (or 44001 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 212333020020 its reverse (20020333212), we get a palindrome (232353353232).

The spelling of 212333020020 in words is "two hundred twelve billion, three hundred thirty-three million, twenty thousand, twenty".