111001021020072 has 48 divisors (see below), whose sum is σ = 305114746847040. Its totient is φ = 36448096452768.

The previous prime is 111001021020061. The next prime is 111001021020073. The reversal of 111001021020072 is 270020120100111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (111001021020073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11505076128 + ... + 11505085775.

It is an arithmetic number, because the mean of its divisors is an integer number (6356557225980).

Almost surely, 2^{111001021020072} is an apocalyptic number.

111001021020072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111001021020072 is an abundant number, since it is smaller than the sum of its proper divisors (194113725826968).

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

111001021020072 is a wasteful number, since it uses less digits than its factorization.

111001021020072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23010161982 (or 23010161975 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

Adding to 111001021020072 its reverse (270020120100111), we get a palindrome (381021141120183).

The spelling of 111001021020072 in words is "one hundred eleven trillion, one billion, twenty-one million, twenty thousand, seventy-two".