11020020111 has 48 divisors (see below), whose sum is σ = 16984041984. Its totient is φ = 7136869824.

The previous prime is 11020020103. The next prime is 11020020119. The reversal of 11020020111 is 11102002011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11020020103) and next prime (11020020119).

It is not a de Polignac number, because 11020020111 - 2³ = 11020020103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11020020093 and 11020020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020020119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1561156 + ... + 1568198.

It is an arithmetic number, because the mean of its divisors is an integer number (353834208).

Almost surely, 2^11020020111 is an apocalyptic number.

11020020111 is a deficient number, since it is larger than the sum of its proper divisors (5964021873).

11020020111 is an equidigital number, since it uses as much as digits as its factorization.

11020020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242 (or 7230 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11020020111 its reverse (11102002011), we get a palindrome (22122022122).

The spelling of 11020020111 in words is "eleven billion, twenty million, twenty thousand, one hundred eleven".