20111201013 has 4 divisors (see below), whose sum is σ = 26814934688. Its totient is φ = 13407467340.

The previous prime is 20111201009. The next prime is 20111201027. The reversal of 20111201013 is 31010211102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20111201013 - 2² = 20111201009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20111201013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111201053) 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 3 ways as a sum of consecutive naturals, for example, 3351866833 + ... + 3351866838.

It is an arithmetic number, because the mean of its divisors is an integer number (6703733672).

Almost surely, 2^20111201013 is an apocalyptic number.

It is an amenable number.

20111201013 is a deficient number, since it is larger than the sum of its proper divisors (6703733675).

20111201013 is an equidigital number, since it uses as much as digits as its factorization.

20111201013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703733674.

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

Adding to 20111201013 its reverse (31010211102), we get a palindrome (51121412115).

The spelling of 20111201013 in words is "twenty billion, one hundred eleven million, two hundred one thousand, thirteen".