20021100212012 has 12 divisors (see below), whose sum is σ = 35036983265256. Its totient is φ = 10010533564800.

The previous prime is 20021100211967. The next prime is 20021100212051. The reversal of 20021100212012 is 21021200112002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176773 + ... + 6436380.

It is an arithmetic number, because the mean of its divisors is an integer number (2919748605438).

Almost surely, 2^{20021100212012} is an apocalyptic number.

It is an amenable number.

20021100212012 is a deficient number, since it is larger than the sum of its proper divisors (15015883053244).

20021100212012 is a wasteful number, since it uses less digits than its factorization.

20021100212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8270608 (or 8270606 counting only the distinct ones).

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

Adding to 20021100212012 its reverse (21021200112002), we get a palindrome (41042300324014).

The spelling of 20021100212012 in words is "twenty trillion, twenty-one billion, one hundred million, two hundred twelve thousand, twelve".