20021210001200 has 60 divisors (see below), whose sum is σ = 50632586364360. Its totient is φ = 7586984839680.

The previous prime is 20021210001139. The next prime is 20021210001203. The reversal of 20021210001200 is 210001212002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20021210001203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1317177269 + ... + 1317192468.

It is an arithmetic number, because the mean of its divisors is an integer number (843876439406).

Almost surely, 2^{20021210001200} is an apocalyptic number.

20021210001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021210001200 is an abundant number, since it is smaller than the sum of its proper divisors (30611376363160).

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

20021210001200 is a wasteful number, since it uses less digits than its factorization.

20021210001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634369774 (or 2634369763 counting only the distinct ones).

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

Adding to 20021210001200 its reverse (210001212002), we get a palindrome (20231211213202).

The spelling of 20021210001200 in words is "twenty trillion, twenty-one billion, two hundred ten million, one thousand, two hundred".