20112121111011 has 8 divisors (see below), whose sum is σ = 26836837015824. Its totient is φ = 13397742973440.

The previous prime is 20112121110997. The next prime is 20112121111037. The reversal of 20112121111011 is 11011112121102.

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

It is not a de Polignac number, because 20112121111011 - 2¹⁰ = 20112121109987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112121113011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2584437270 + ... + 2584445051.

It is an arithmetic number, because the mean of its divisors is an integer number (3354604626978).

Almost surely, 2^{20112121111011} is an apocalyptic number.

20112121111011 is a deficient number, since it is larger than the sum of its proper divisors (6724715904813).

20112121111011 is a wasteful number, since it uses less digits than its factorization.

20112121111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168883621.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 20112121111011 its reverse (11011112121102), we get a palindrome (31123233232113).

The spelling of 20112121111011 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, eleven".