11021004 has 18 divisors (see below), whose sum is σ = 27858740. Its totient is φ = 3673656.

The previous prime is 11020991. The next prime is 11021009. The reversal of 11021004 is 40012011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (11021009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153034 + ... + 153105.

Almost surely, 2^11021004 is an apocalyptic number.

It is an amenable number.

11021004 is an abundant number, since it is smaller than the sum of its proper divisors (16837736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11021004 is a wasteful number, since it uses less digits than its factorization.

11021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306149 (or 306144 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 11021004 is about 3319.7897523789. The cubic root of 11021004 is about 222.5394720192.

Adding to 11021004 its reverse (40012011), we get a palindrome (51033015).

The spelling of 11021004 in words is "eleven million, twenty-one thousand, four".