111020102020 has 48 divisors (see below), whose sum is σ = 241957497600. Its totient is φ = 42738792320.

The previous prime is 111020102009. The next prime is 111020102023. The reversal of 111020102020 is 20201020111.

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 = 111020101988 and 111020102006.

It is not an unprimeable number, because it can be changed into a prime (111020102023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127360 + ... + 488119.

It is an arithmetic number, because the mean of its divisors is an integer number (5040781200).

Almost surely, 2^111020102020 is an apocalyptic number.

111020102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111020102020 is an abundant number, since it is smaller than the sum of its proper divisors (130937395580).

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

111020102020 is a wasteful number, since it uses less digits than its factorization.

111020102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615828 (or 615826 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111020102020 its reverse (20201020111), we get a palindrome (131221122131).

The spelling of 111020102020 in words is "one hundred eleven billion, twenty million, one hundred two thousand, twenty".