111012101020 has 48 divisors (see below), whose sum is σ = 238864651200. Its totient is φ = 43312135680.

The previous prime is 111012101017. The next prime is 111012101033. The reversal of 111012101020 is 20101210111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 111012100988 and 111012101006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4480426 + ... + 4505134.

It is an arithmetic number, because the mean of its divisors is an integer number (4976346900).

Almost surely, 2^111012101020 is an apocalyptic number.

111012101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012101020 is an abundant number, since it is smaller than the sum of its proper divisors (127852550180).

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

111012101020 is a wasteful number, since it uses less digits than its factorization.

111012101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30238 (or 30236 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111012101020 its reverse (20101210111), we get a palindrome (131113311131).

The spelling of 111012101020 in words is "one hundred eleven billion, twelve million, one hundred one thousand, twenty".