111021110101220 has 48 divisors (see below), whose sum is σ = 255167737247808. Its totient is φ = 40239810092160.

The previous prime is 111021110101219. The next prime is 111021110101271. The reversal of 111021110101220 is 22101011120111.

It is a junction number, because it is equal to n+sod(n) for n = 111021110101195 and 111021110101204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821824007 + ... + 821959086.

It is an arithmetic number, because the mean of its divisors is an integer number (5315994525996).

Almost surely, 2^{111021110101220} is an apocalyptic number.

111021110101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021110101220 is an abundant number, since it is smaller than the sum of its proper divisors (144146627146588).

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

111021110101220 is a wasteful number, since it uses less digits than its factorization.

111021110101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643783420 (or 1643783418 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111021110101220 its reverse (22101011120111), we get a palindrome (133122121221331).

The spelling of 111021110101220 in words is "one hundred eleven trillion, twenty-one billion, one hundred ten million, one hundred one thousand, two hundred twenty".