111111010020220 has 96 divisors (see below), whose sum is σ = 278286328857600. Its totient is φ = 36435523137024.

The previous prime is 111111010020193. The next prime is 111111010020221. The reversal of 111111010020220 is 22020010111111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 111111010020220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111010020221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33377136 + ... + 36554824.

It is an arithmetic number, because the mean of its divisors is an integer number (2898815925600).

Almost surely, 2^{111111010020220} is an apocalyptic number.

111111010020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111010020220 is an abundant number, since it is smaller than the sum of its proper divisors (167175318837380).

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

111111010020220 is a wasteful number, since it uses less digits than its factorization.

111111010020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3188587 (or 3188585 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111111010020220 its reverse (22020010111111), we get a palindrome (133131020131331).

The spelling of 111111010020220 in words is "one hundred eleven trillion, one hundred eleven billion, ten million, twenty thousand, two hundred twenty".