20021212200000 has 336 divisors, whose sum is σ = 72231024293568. Its totient is φ = 4853625600000.

The previous prime is 20021212199993. The next prime is 20021212200001. The reversal of 20021212200000 is 221212002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20021212200001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5083242 + ... + 8116758.

It is an arithmetic number, because the mean of its divisors is an integer number (214973286588).

Almost surely, 2^{20021212200000} is an apocalyptic number.

20021212200000 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 20021212200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36115512146784).

20021212200000 is an abundant number, since it is smaller than the sum of its proper divisors (52209812093568).

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

20021212200000 is an equidigital number, since it uses as much as digits as its factorization.

20021212200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033568 (or 3033538 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20021212200000 its reverse (221212002), we get a palindrome (20021433412002).

The spelling of 20021212200000 in words is "twenty trillion, twenty-one billion, two hundred twelve million, two hundred thousand".