11156021 has 8 divisors (see below), whose sum is σ = 11800320. Its totient is φ = 10517472.

The previous prime is 11156009. The next prime is 11156051. The reversal of 11156021 is 12065111.

11156021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11156021 - 2⁶ = 11155957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2921 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (1475040).

Almost surely, 2^11156021 is an apocalyptic number.

It is an amenable number.

11156021 is a deficient number, since it is larger than the sum of its proper divisors (644299).

11156021 is a wasteful number, since it uses less digits than its factorization.

11156021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 11156021 is about 3340.0630233575. The cubic root of 11156021 is about 223.4445541418. Note that the first 3 decimals are identical.

The spelling of 11156021 in words is "eleven million, one hundred fifty-six thousand, twenty-one".