111222212020 has 48 divisors (see below), whose sum is σ = 249754509648. Its totient is φ = 41457305600.

The previous prime is 111222211999. The next prime is 111222212041. The reversal of 111222212020 is 20212222111.

It is a happy number.

111222212020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (111222211999) and next prime (111222212041).

It can be written as a sum of positive squares in 8 ways, for example, as 129322384 + 111092889636 = 11372^2 + 333306^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111222211985 and 111222212003.

It is a congruent number.

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, 1585087 + ... + 1653766.

It is an arithmetic number, because the mean of its divisors is an integer number (5203218951).

Almost surely, 2^111222212020 is an apocalyptic number.

111222212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222212020 is an abundant number, since it is smaller than the sum of its proper divisors (138532297628).

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

111222212020 is a wasteful number, since it uses less digits than its factorization.

111222212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238980 (or 3238978 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111222212020 its reverse (20212222111), we get a palindrome (131434434131).

The spelling of 111222212020 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, twenty".