11000021011 has 16 divisors (see below), whose sum is σ = 12647289088. Its totient is φ = 9371829600.

The previous prime is 11000020979. The next prime is 11000021017. The reversal of 11000021011 is 11012000011.

It is not a de Polignac number, because 11000021011 - 2⁵ = 11000020979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 11000020985 and 11000021003.

It is not an unprimeable number, because it can be changed into a prime (11000021017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1255516 + ... + 1264246.

It is an arithmetic number, because the mean of its divisors is an integer number (790455568).

Almost surely, 2^11000021011 is an apocalyptic number.

11000021011 is a deficient number, since it is larger than the sum of its proper divisors (1647268077).

11000021011 is an equidigital number, since it uses as much as digits as its factorization.

11000021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9802.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 11000021011 its reverse (11012000011), we get a palindrome (22012021022).

The spelling of 11000021011 in words is "eleven billion, twenty-one thousand, eleven".