111121012101220 has 48 divisors (see below), whose sum is σ = 254581766058816. Its totient is φ = 40405477392000.

The previous prime is 111121012101139. The next prime is 111121012101233. The reversal of 111121012101220 is 22101210121111.

It is a junction number, because it is equal to n+sod(n) for n = 111121012101194 and 111121012101203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9399711 + ... + 17623750.

It is an arithmetic number, because the mean of its divisors is an integer number (5303786792892).

Almost surely, 2^{111121012101220} is an apocalyptic number.

111121012101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121012101220 is an abundant number, since it is smaller than the sum of its proper divisors (143460753957596).

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

111121012101220 is a wasteful number, since it uses less digits than its factorization.

111121012101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27042172 (or 27042170 counting only the distinct ones).

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

Adding to 111121012101220 its reverse (22101210121111), we get a palindrome (133222222222331).

The spelling of 111121012101220 in words is "one hundred eleven trillion, one hundred twenty-one billion, twelve million, one hundred one thousand, two hundred twenty".