111111011102020 has 24 divisors (see below), whose sum is σ = 233871998905944. Its totient is φ = 44341761470976.

The previous prime is 111111011101973. The next prime is 111111011102023. The reversal of 111111011102020 is 20201110111111.

It can be written as a sum of positive squares in 4 ways, for example, as 3706764687616 + 107404246414404 = 1925296^2 + 10363602^2 .

It is a super-2 number, since 2×111111011102020² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111111011102023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6415176739 + ... + 6415194058.

It is an arithmetic number, because the mean of its divisors is an integer number (9744666621081).

Almost surely, 2^{111111011102020} is an apocalyptic number.

111111011102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111011102020 is an abundant number, since it is smaller than the sum of its proper divisors (122760987803924).

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

111111011102020 is a wasteful number, since it uses less digits than its factorization.

111111011102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12830371239 (or 12830371237 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111111011102020 its reverse (20201110111111), we get a palindrome (131312121213131).

Subtracting from 111111011102020 its reverse (20201110111111), we obtain a palindrome (90909900990909).

The spelling of 111111011102020 in words is "one hundred eleven trillion, one hundred eleven billion, eleven million, one hundred two thousand, twenty".