111212101110220 has 24 divisors (see below), whose sum is σ = 254776813453008. Its totient is φ = 40440764040000.

The previous prime is 111212101110163. The next prime is 111212101110239. The reversal of 111212101110220 is 22011101212111.

It is a junction number, because it is equal to n+sod(n) for n = 111212101110194 and 111212101110203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252754775031 + ... + 252754775470.

It is an arithmetic number, because the mean of its divisors is an integer number (10615700560542).

Almost surely, 2^{111212101110220} is an apocalyptic number.

111212101110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212101110220 is an abundant number, since it is smaller than the sum of its proper divisors (143564712342788).

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

111212101110220 is a wasteful number, since it uses less digits than its factorization.

111212101110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505509550521 (or 505509550519 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111212101110220 its reverse (22011101212111), we get a palindrome (133223202322331).

The spelling of 111212101110220 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred one million, one hundred ten thousand, two hundred twenty".