20101201011011 has 4 divisors (see below), whose sum is σ = 21283624599912. Its totient is φ = 18918777422112.

The previous prime is 20101201010951. The next prime is 20101201011041. The reversal of 20101201011011 is 11011010210102.

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 20101201011011 - 2¹⁴ = 20101200994627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101201010983 and 20101201011001.

It is not an unprimeable number, because it can be changed into a prime (20101201011041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591211794425 + ... + 591211794458.

It is an arithmetic number, because the mean of its divisors is an integer number (5320906149978).

Almost surely, 2^{20101201011011} is an apocalyptic number.

20101201011011 is a deficient number, since it is larger than the sum of its proper divisors (1182423588901).

20101201011011 is a wasteful number, since it uses less digits than its factorization.

20101201011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182423588900.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20101201011011 its reverse (11011010210102), we get a palindrome (31112211221113).

The spelling of 20101201011011 in words is "twenty trillion, one hundred one billion, two hundred one million, eleven thousand, eleven".