11020203311 has 4 divisors (see below), whose sum is σ = 11867911272. Its totient is φ = 10172495352.

The previous prime is 11020203269. The next prime is 11020203367. The reversal of 11020203311 is 11330202011.

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 11020203311 - 2¹⁸ = 11019941167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020203011) 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, 423853961 + ... + 423853986.

It is an arithmetic number, because the mean of its divisors is an integer number (2966977818).

Almost surely, 2^11020203311 is an apocalyptic number.

11020203311 is a deficient number, since it is larger than the sum of its proper divisors (847707961).

11020203311 is an equidigital number, since it uses as much as digits as its factorization.

11020203311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847707960.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 11020203311 its reverse (11330202011), we get a palindrome (22350405322).

The spelling of 11020203311 in words is "eleven billion, twenty million, two hundred three thousand, three hundred eleven".