20121200012011 has 12 divisors (see below), whose sum is σ = 23407533462600. Its totient is φ = 17245829499360.

The previous prime is 20121200012009. The next prime is 20121200012027. The reversal of 20121200012011 is 11021000212102.

It is not a de Polignac number, because 20121200012011 - 2¹ = 20121200012009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121200011982 and 20121200012000.

It is not an unprimeable number, because it can be changed into a prime (20121200012311) 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, 9937930 + ... + 11790031.

It is an arithmetic number, because the mean of its divisors is an integer number (1950627788550).

Almost surely, 2^{20121200012011} is an apocalyptic number.

20121200012011 is a deficient number, since it is larger than the sum of its proper divisors (3286333450589).

20121200012011 is a wasteful number, since it uses less digits than its factorization.

20121200012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21746874 (or 21746867 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121200012011 its reverse (11021000212102), we get a palindrome (31142200224113).

The spelling of 20121200012011 in words is "twenty trillion, one hundred twenty-one billion, two hundred million, twelve thousand, eleven".