11021009985 has 64 divisors (see below), whose sum is σ = 20782656000. Its totient is φ = 5522190336.

The previous prime is 11021009969. The next prime is 11021010109. The reversal of 11021009985 is 58990012011.

It is not a de Polignac number, because 11021009985 - 2⁴ = 11021009969 is a prime.

It is a super-2 number, since 2×11021009985² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1370697 + ... + 1378713.

It is an arithmetic number, because the mean of its divisors is an integer number (324729000).

Almost surely, 2^11021009985 is an apocalyptic number.

11021009985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11021009985 is a deficient number, since it is larger than the sum of its proper divisors (9761646015).

11021009985 is a wasteful number, since it uses less digits than its factorization.

11021009985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8647 (or 8641 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The spelling of 11021009985 in words is "eleven billion, twenty-one million, nine thousand, nine hundred eighty-five".