111212310220 has 48 divisors (see below), whose sum is σ = 254812826016. Its totient is φ = 40435200000.

The previous prime is 111212310203. The next prime is 111212310233. The reversal of 111212310220 is 22013212111.

It is a junction number, because it is equal to n+sod(n) for n = 111212310194 and 111212310203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1751020 + ... + 1813420.

It is an arithmetic number, because the mean of its divisors is an integer number (5308600542).

Almost surely, 2^111212310220 is an apocalyptic number.

111212310220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212310220 is an abundant number, since it is smaller than the sum of its proper divisors (143600515796).

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

111212310220 is a wasteful number, since it uses less digits than its factorization.

111212310220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70522 (or 70520 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111212310220 its reverse (22013212111), we get a palindrome (133225522331).

The spelling of 111212310220 in words is "one hundred eleven billion, two hundred twelve million, three hundred ten thousand, two hundred twenty".