111102021012 has 24 divisors (see below), whose sum is σ = 259362323136. Its totient is φ = 37016253568.

The previous prime is 111102021011. The next prime is 111102021013. The reversal of 111102021012 is 210120201111.

It is an interprime number because it is at equal distance from previous prime (111102021011) and next prime (111102021013).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102021011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2193093 + ... + 2243180.

It is an arithmetic number, because the mean of its divisors is an integer number (10806763464).

Almost surely, 2^111102021012 is an apocalyptic number.

111102021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111102021012 is an abundant number, since it is smaller than the sum of its proper divisors (148260302124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111102021012 is a wasteful number, since it uses less digits than its factorization.

111102021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438367 (or 4438365 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111102021012 its reverse (210120201111), we get a palindrome (321222222123).

The spelling of 111102021012 in words is "one hundred eleven billion, one hundred two million, twenty-one thousand, twelve".