20001201209996 has 12 divisors (see below), whose sum is σ = 35002172853648. Its totient is φ = 10000580394672.

The previous prime is 20001201209959. The next prime is 20001201210037. The reversal of 20001201209996 is 69990210210002.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2704631 + ... + 6878766.

It is an arithmetic number, because the mean of its divisors is an integer number (2916847737804).

Almost surely, 2^{20001201209996} is an apocalyptic number.

It is an amenable number.

20001201209996 is a deficient number, since it is larger than the sum of its proper divisors (15000971643652).

20001201209996 is a wasteful number, since it uses less digits than its factorization.

20001201209996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105168 (or 10105166 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 41.

Adding to 20001201209996 its reverse (69990210210002), we get a palindrome (89991411419998).

The spelling of 20001201209996 in words is "twenty trillion, one billion, two hundred one million, two hundred nine thousand, nine hundred ninety-six".