20111220113 has 8 divisors (see below), whose sum is σ = 20468469696. Its totient is φ = 19754859600.

The previous prime is 20111220097. The next prime is 20111220119. The reversal of 20111220113 is 31102211102.

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

It is a cyclic number.

It is not a de Polignac number, because 20111220113 - 2⁴ = 20111220097 is a prime.

It is a super-2 number, since 2×20111220113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111220119) 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, 176543 + ... + 267188.

It is an arithmetic number, because the mean of its divisors is an integer number (2558558712).

Almost surely, 2^20111220113 is an apocalyptic number.

It is an amenable number.

20111220113 is a deficient number, since it is larger than the sum of its proper divisors (357249583).

20111220113 is an equidigital number, since it uses as much as digits as its factorization.

20111220113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444535.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20111220113 its reverse (31102211102), we get a palindrome (51213431215).

The spelling of 20111220113 in words is "twenty billion, one hundred eleven million, two hundred twenty thousand, one hundred thirteen".