20021211021200 has 30 divisors (see below), whose sum is σ = 48100959479394. Its totient is φ = 8008484408320.

The previous prime is 20021211021197. The next prime is 20021211021209. The reversal of 20021211021200 is 212011212002.

20021211021200 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 391455440896 + 19629755580304 = 625664^2 + 4430548^2 .

It is not an unprimeable number, because it can be changed into a prime (20021211021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25026513377 + ... + 25026514176.

Almost surely, 2^{20021211021200} is an apocalyptic number.

20021211021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021211021200 is an abundant number, since it is smaller than the sum of its proper divisors (28079748458194).

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

20021211021200 is a wasteful number, since it uses less digits than its factorization.

20021211021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50053027571 (or 50053027560 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021211021200 its reverse (212011212002), we get a palindrome (20233222233202).

The spelling of 20021211021200 in words is "twenty trillion, twenty-one billion, two hundred eleven million, twenty-one thousand, two hundred".