11020012011 has 20 divisors (see below), whose sum is σ = 17177734992. Its totient is φ = 7027252848.

The previous prime is 11020012009. The next prime is 11020012013. The reversal of 11020012011 is 11021002011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11020012009) and next prime (11020012013).

It is not a de Polignac number, because 11020012011 - 2¹ = 11020012009 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 = 11020011984 and 11020012002.

It is not an unprimeable number, because it can be changed into a prime (11020012013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2955736 + ... + 2959461.

Almost surely, 2^11020012011 is an apocalyptic number.

11020012011 is a deficient number, since it is larger than the sum of its proper divisors (6157722981).

11020012011 is an equidigital number, since it uses as much as digits as its factorization.

11020012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915232 (or 5915223 counting only the distinct ones).

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

Adding to 11020012011 its reverse (11021002011), we get a palindrome (22041014022).

The spelling of 11020012011 in words is "eleven billion, twenty million, twelve thousand, eleven".