20112121112011 has 8 divisors (see below), whose sum is σ = 20547771143760. Its totient is φ = 19681130439168.

The previous prime is 20112121111933. The next prime is 20112121112029. The reversal of 20112121112011 is 11021112121102.

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 20112121112011 - 2²³ = 20112112723403 is a prime.

It is a Duffinian number.

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, 1164831001 + ... + 1164848266.

It is an arithmetic number, because the mean of its divisors is an integer number (2568471392970).

Almost surely, 2^{20112121112011} is an apocalyptic number.

20112121112011 is a deficient number, since it is larger than the sum of its proper divisors (435650031749).

20112121112011 is an equidigital number, since it uses as much as digits as its factorization.

20112121112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329679453.

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

Adding to 20112121112011 its reverse (11021112121102), we get a palindrome (31133233233113).

The spelling of 20112121112011 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, eleven".