111220121200220 has 24 divisors (see below), whose sum is σ = 233563534570800. Its totient is φ = 44487804660992.

The previous prime is 111220121200187. The next prime is 111220121200289. The reversal of 111220121200220 is 22002121022111.

It is a congruent number.

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, 11475530 + ... + 18818289.

It is an arithmetic number, because the mean of its divisors is an integer number (9731813940450).

Almost surely, 2^{111220121200220} is an apocalyptic number.

111220121200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220121200220 is an abundant number, since it is smaller than the sum of its proper divisors (122343413370580).

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

111220121200220 is a wasteful number, since it uses less digits than its factorization.

111220121200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30477397 (or 30477395 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111220121200220 its reverse (22002121022111), we get a palindrome (133222242222331).

The spelling of 111220121200220 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, two hundred thousand, two hundred twenty".