20011121111113 has 32 divisors (see below), whose sum is σ = 22331484241920. Its totient is φ = 17775585408960.

The previous prime is 20011121111089. The next prime is 20011121111129. The reversal of 20011121111113 is 31111112111002.

It is a cyclic number.

It is not a de Polignac number, because 20011121111113 - 2⁵ = 20011121111081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011121111413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 815869056 + ... + 815893582.

It is an arithmetic number, because the mean of its divisors is an integer number (697858882560).

Almost surely, 2^{20011121111113} is an apocalyptic number.

It is an amenable number.

20011121111113 is a deficient number, since it is larger than the sum of its proper divisors (2320363130807).

20011121111113 is a wasteful number, since it uses less digits than its factorization.

20011121111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27117.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 20011121111113 its reverse (31111112111002), we get a palindrome (51122233222115).

The spelling of 20011121111113 in words is "twenty trillion, eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred thirteen".