20101012112011 has 4 divisors (see below), whose sum is σ = 20125495684224. Its totient is φ = 20076528539800.

The previous prime is 20101012111997. The next prime is 20101012112033. The reversal of 20101012112011 is 11021121010102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20101012112011 - 2⁷ = 20101012111883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101012111982 and 20101012112000.

It is not an unprimeable number, because it can be changed into a prime (20101082112011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12241784875 + ... + 12241786516.

It is an arithmetic number, because the mean of its divisors is an integer number (5031373921056).

Almost surely, 2^{20101012112011} is an apocalyptic number.

20101012112011 is a deficient number, since it is larger than the sum of its proper divisors (24483572213).

20101012112011 is an equidigital number, since it uses as much as digits as its factorization.

20101012112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24483572212.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20101012112011 its reverse (11021121010102), we get a palindrome (31122133122113).

The spelling of 20101012112011 in words is "twenty trillion, one hundred one billion, twelve million, one hundred twelve thousand, eleven".