111222102220020 has 96 divisors (see below), whose sum is σ = 377481074221440. Its totient is φ = 26962933870080.

The previous prime is 111222102220013. The next prime is 111222102220027. The reversal of 111222102220020 is 20022201222111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111222102220013) and next prime (111222102220027).

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 = 111222102219975 and 111222102220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222102220027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9362123877 + ... + 9362135756.

It is an arithmetic number, because the mean of its divisors is an integer number (3932094523140).

Almost surely, 2^{111222102220020} is an apocalyptic number.

111222102220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222102220020 is an abundant number, since it is smaller than the sum of its proper divisors (266258972001420).

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

111222102220020 is a wasteful number, since it uses less digits than its factorization.

111222102220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18724259662 (or 18724259654 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 111222102220020 its reverse (20022201222111), we get a palindrome (131244303442131).

The spelling of 111222102220020 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred two million, two hundred twenty thousand, twenty".