11033120021 has 32 divisors (see below), whose sum is σ = 14186853120. Its totient is φ = 8329651200.

The previous prime is 11033120017. The next prime is 11033120053. The reversal of 11033120021 is 12002133011.

It is a cyclic number.

It is not a de Polignac number, because 11033120021 - 2² = 11033120017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11033119978 and 11033120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11033120221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678575 + ... + 694643.

It is an arithmetic number, because the mean of its divisors is an integer number (443339160).

Almost surely, 2^11033120021 is an apocalyptic number.

11033120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11033120021 is a deficient number, since it is larger than the sum of its proper divisors (3153733099).

11033120021 is a wasteful number, since it uses less digits than its factorization.

11033120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16365.

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

Adding to 11033120021 its reverse (12002133011), we get a palindrome (23035253032).

The spelling of 11033120021 in words is "eleven billion, thirty-three million, one hundred twenty thousand, twenty-one".