20100011011 has 4 divisors (see below), whose sum is σ = 20590255224. Its totient is φ = 19609766800.

The previous prime is 20100011003. The next prime is 20100011021. The reversal of 20100011011 is 11011000102.

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 20100011011 - 2³ = 20100011003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100010985 and 20100011003.

It is not an unprimeable number, because it can be changed into a prime (20100011021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245122045 + ... + 245122126.

It is an arithmetic number, because the mean of its divisors is an integer number (5147563806).

Almost surely, 2^20100011011 is an apocalyptic number.

20100011011 is a deficient number, since it is larger than the sum of its proper divisors (490244213).

20100011011 is an equidigital number, since it uses as much as digits as its factorization.

20100011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490244212.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20100011011 its reverse (11011000102), we get a palindrome (31111011113).

The spelling of 20100011011 in words is "twenty billion, one hundred million, eleven thousand, eleven".