111211023220 has 48 divisors (see below), whose sum is σ = 255916942848. Its totient is φ = 40259007360.

The previous prime is 111211023179. The next prime is 111211023227. The reversal of 111211023220 is 22320112111.

It is a junction number, because it is equal to n+sod(n) for n = 111211023194 and 111211023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211023227) by changing a digit.

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, 1084359 + ... + 1182478.

It is an arithmetic number, because the mean of its divisors is an integer number (5331602976).

Almost surely, 2^111211023220 is an apocalyptic number.

111211023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211023220 is an abundant number, since it is smaller than the sum of its proper divisors (144705919628).

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

111211023220 is a wasteful number, since it uses less digits than its factorization.

111211023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267080 (or 2267078 counting only the distinct ones).

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

Adding to 111211023220 its reverse (22320112111), we get a palindrome (133531135331).

The spelling of 111211023220 in words is "one hundred eleven billion, two hundred eleven million, twenty-three thousand, two hundred twenty".