20011112120111 has 16 divisors (see below), whose sum is σ = 22883414750208. Its totient is φ = 17142204463200.

The previous prime is 20011112120059. The next prime is 20011112120147. The reversal of 20011112120111 is 11102121111002.

It is a cyclic number.

It is not a de Polignac number, because 20011112120111 - 2¹⁸ = 20011111857967 is a prime.

It is a super-2 number, since 2×20011112120111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011112120191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136857101 + ... + 137003241.

It is an arithmetic number, because the mean of its divisors is an integer number (1430213421888).

Almost surely, 2^{20011112120111} is an apocalyptic number.

20011112120111 is a deficient number, since it is larger than the sum of its proper divisors (2872302630097).

20011112120111 is a wasteful number, since it uses less digits than its factorization.

20011112120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157622.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20011112120111 its reverse (11102121111002), we get a palindrome (31113233231113).

The spelling of 20011112120111 in words is "twenty trillion, eleven billion, one hundred twelve million, one hundred twenty thousand, one hundred eleven".