20021201210000 has 100 divisors (see below), whose sum is σ = 48926354642352. Its totient is φ = 7933634448000.

The previous prime is 20021201209991. The next prime is 20021201210039. The reversal of 20021201210000 is 1210212002.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8285702 + ... + 10425701.

Almost surely, 2^{20021201210000} is an apocalyptic number.

20021201210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021201210000 is an abundant number, since it is smaller than the sum of its proper divisors (28905153432352).

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

20021201210000 is a wasteful number, since it uses less digits than its factorization.

20021201210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18711538 (or 18711517 counting only the distinct ones).

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

Adding to 20021201210000 its reverse (1210212002), we get a palindrome (20022411422002).

The spelling of 20021201210000 in words is "twenty trillion, twenty-one billion, two hundred one million, two hundred ten thousand".