11020111121985 has 128 divisors (see below), whose sum is σ = 21381237964800. Its totient is φ = 4731477442560.

The previous prime is 11020111121963. The next prime is 11020111121993. The reversal of 11020111121985 is 58912111102011.

It is not a de Polignac number, because 11020111121985 - 2⁷ = 11020111121857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2011333476 + ... + 2011338954.

It is an arithmetic number, because the mean of its divisors is an integer number (167040921600).

Almost surely, 2^{11020111121985} is an apocalyptic number.

11020111121985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11020111121985 is a deficient number, since it is larger than the sum of its proper divisors (10361126842815).

11020111121985 is a wasteful number, since it uses less digits than its factorization.

11020111121985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7671.

The product of its (nonzero) digits is 1440, while the sum is 33.

Adding to 11020111121985 its reverse (58912111102011), we get a palindrome (69932222223996).

The spelling of 11020111121985 in words is "eleven trillion, twenty billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred eighty-five".