20120023112111 has 32 divisors (see below), whose sum is σ = 22119084408960. Its totient is φ = 18186812227584.

The previous prime is 20120023112047. The next prime is 20120023112129. The reversal of 20120023112111 is 11121132002102.

It is a happy number.

It is not a de Polignac number, because 20120023112111 - 2⁶ = 20120023112047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120023112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120023112711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2122584470 + ... + 2122593948.

It is an arithmetic number, because the mean of its divisors is an integer number (691221387780).

Almost surely, 2^{20120023112111} is an apocalyptic number.

20120023112111 is a deficient number, since it is larger than the sum of its proper divisors (1999061296849).

20120023112111 is a wasteful number, since it uses less digits than its factorization.

20120023112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15155.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20120023112111 its reverse (11121132002102), we get a palindrome (31241155114213).

The spelling of 20120023112111 in words is "twenty trillion, one hundred twenty billion, twenty-three million, one hundred twelve thousand, one hundred eleven".