11020020311 has 4 divisors (see below), whose sum is σ = 11600021400. Its totient is φ = 10440019224.

The previous prime is 11020020301. The next prime is 11020020353. The reversal of 11020020311 is 11302002011.

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

It is a de Polignac number, because none of the positive numbers 2^k-11020020311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020020292 and 11020020301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020020301) 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, 290000516 + ... + 290000553.

It is an arithmetic number, because the mean of its divisors is an integer number (2900005350).

Almost surely, 2^11020020311 is an apocalyptic number.

11020020311 is a deficient number, since it is larger than the sum of its proper divisors (580001089).

11020020311 is an equidigital number, since it uses as much as digits as its factorization.

11020020311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580001088.

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

Adding to 11020020311 its reverse (11302002011), we get a palindrome (22322022322).

The spelling of 11020020311 in words is "eleven billion, twenty million, twenty thousand, three hundred eleven".