111213020021220 has 144 divisors (see below), whose sum is σ = 363299198545920. Its totient is φ = 27375261458688.

The previous prime is 111213020021219. The next prime is 111213020021263. The reversal of 111213020021220 is 22120020312111.

111213020021220 is a `hidden beast` number, since 1 + 1 + 121 + 302 + 0 + 0 + 21 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111213020021193 and 111213020021202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 503829717 + ... + 504050403.

Almost surely, 2^{111213020021220} is an apocalyptic number.

111213020021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111213020021220 is an abundant number, since it is smaller than the sum of its proper divisors (252086178524700).

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

111213020021220 is a wasteful number, since it uses less digits than its factorization.

111213020021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436074 (or 436069 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 111213020021220 its reverse (22120020312111), we get a palindrome (133333040333331).

The spelling of 111213020021220 in words is "one hundred eleven trillion, two hundred thirteen billion, twenty million, twenty-one thousand, two hundred twenty".