20010312011 has 4 divisors (see below), whose sum is σ = 20700322800. Its totient is φ = 19320301224.

The previous prime is 20010311987. The next prime is 20010312059. The reversal of 20010312011 is 11021301002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010312011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010311983 and 20010312001.

It is not an unprimeable number, because it can be changed into a prime (20010312071) 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, 345005351 + ... + 345005408.

It is an arithmetic number, because the mean of its divisors is an integer number (5175080700).

Almost surely, 2^20010312011 is an apocalyptic number.

20010312011 is a deficient number, since it is larger than the sum of its proper divisors (690010789).

20010312011 is an equidigital number, since it uses as much as digits as its factorization.

20010312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690010788.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20010312011 its reverse (11021301002), we get a palindrome (31031613013).

The spelling of 20010312011 in words is "twenty billion, ten million, three hundred twelve thousand, eleven".