20111201113 has 4 divisors (see below), whose sum is σ = 20759949568. Its totient is φ = 19462452660.

The previous prime is 20111201107. The next prime is 20111201129. The reversal of 20111201113 is 31110211102.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 20111201113 - 2¹⁷ = 20111070041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111201093 and 20111201102.

It is not an unprimeable number, because it can be changed into a prime (20111201153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324374181 + ... + 324374242.

It is an arithmetic number, because the mean of its divisors is an integer number (5189987392).

Almost surely, 2^20111201113 is an apocalyptic number.

It is an amenable number.

20111201113 is a deficient number, since it is larger than the sum of its proper divisors (648748455).

20111201113 is an equidigital number, since it uses as much as digits as its factorization.

20111201113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648748454.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20111201113 its reverse (31110211102), we get a palindrome (51221412215).

The spelling of 20111201113 in words is "twenty billion, one hundred eleven million, two hundred one thousand, one hundred thirteen".