11022021009 has 72 divisors (see below), whose sum is σ = 17356571648. Its totient is φ = 6736504320.

The previous prime is 11022020951. The next prime is 11022021013. The reversal of 11022021009 is 90012022011.

It is not a de Polignac number, because 11022021009 - 2¹⁹ = 11021496721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11022020982 and 11022021000.

It is not an unprimeable number, because it can be changed into a prime (11022021029) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 20149674 + ... + 20150220.

Almost surely, 2^11022021009 is an apocalyptic number.

It is an amenable number.

11022021009 is a deficient number, since it is larger than the sum of its proper divisors (6334550639).

11022021009 is a wasteful number, since it uses less digits than its factorization.

11022021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 11022021009 in words is "eleven billion, twenty-two million, twenty-one thousand, nine".