10111111989 has 24 divisors (see below), whose sum is σ = 15219009120. Its totient is φ = 5962318560.

The previous prime is 10111111963. The next prime is 10111112003. The reversal of 10111111989 is 98911111101.

It is not a de Polignac number, because 10111111989 - 2¹⁵ = 10111079221 is a prime.

It is a super-2 number, since 2×10111111989² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111111909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362979 + ... + 389840.

It is an arithmetic number, because the mean of its divisors is an integer number (634125380).

Almost surely, 2^10111111989 is an apocalyptic number.

It is an amenable number.

10111111989 is a deficient number, since it is larger than the sum of its proper divisors (5107897131).

10111111989 is a wasteful number, since it uses less digits than its factorization.

10111111989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752881 (or 752870 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 33.

The spelling of 10111111989 in words is "ten billion, one hundred eleven million, one hundred eleven thousand, nine hundred eighty-nine".