999885555522111 has 32 divisors (see below), whose sum is σ = 1344792790252800. Its totient is φ = 660799390417920.

The previous prime is 999885555521969. The next prime is 999885555522137. The reversal of 999885555522111 is 111225555588999.

It is not a de Polignac number, because 999885555522111 - 2⁹ = 999885555521599 is a prime.

It is a super-2 number, since 2×999885555522111² (a number of 31 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999885555522811) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 906335740 + ... + 907438286.

It is an arithmetic number, because the mean of its divisors is an integer number (42024774695400).

Almost surely, 2^{999885555522111} is an apocalyptic number.

999885555522111 is a deficient number, since it is larger than the sum of its proper divisors (344907234730689).

999885555522111 is a wasteful number, since it uses less digits than its factorization.

999885555522111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105959.

The product of its digits is 583200000, while the sum is 75.

The spelling of 999885555522111 in words is "nine hundred ninety-nine trillion, eight hundred eighty-five billion, five hundred fifty-five million, five hundred twenty-two thousand, one hundred eleven".