20121000211011 has 8 divisors (see below), whose sum is σ = 30660571750144. Its totient is φ = 11497714406280.

The previous prime is 20121000210989. The next prime is 20121000211027. The reversal of 20121000211011 is 11011200012102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20121000211011 - 2¹³ = 20121000202819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121000211031) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 479071433575 + ... + 479071433616.

It is an arithmetic number, because the mean of its divisors is an integer number (3832571468768).

Almost surely, 2^{20121000211011} is an apocalyptic number.

20121000211011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20121000211011 is a deficient number, since it is larger than the sum of its proper divisors (10539571539133).

20121000211011 is an equidigital number, since it uses as much as digits as its factorization.

20121000211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958142867201.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20121000211011 its reverse (11011200012102), we get a palindrome (31132200223113).

The spelling of 20121000211011 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven thousand, eleven".