20021002011200 has 84 divisors (see below), whose sum is σ = 49442028186612. Its totient is φ = 7979489433600.

The previous prime is 20021002011193. The next prime is 20021002011223. The reversal of 20021002011200 is 211020012002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3860344730176 + 16160657281024 = 1964776^2 + 4020032^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22143671 + ... + 23030070.

Almost surely, 2^{20021002011200} is an apocalyptic number.

20021002011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021002011200 is an abundant number, since it is smaller than the sum of its proper divisors (29421026175412).

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

20021002011200 is a wasteful number, since it uses less digits than its factorization.

20021002011200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45174040 (or 45174025 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021002011200 its reverse (211020012002), we get a palindrome (20232022023202).

The spelling of 20021002011200 in words is "twenty trillion, twenty-one billion, two million, eleven thousand, two hundred".