111220122111020 has 24 divisors (see below), whose sum is σ = 251528583851664. Its totient is φ = 41065891240896.

The previous prime is 111220122111017. The next prime is 111220122111029. The reversal of 111220122111020 is 20111221022111.

It is a self number, because there is not a number n which added to its sum of digits gives 111220122111020.

It is not an unprimeable number, because it can be changed into a prime (111220122111029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213884849954 + ... + 213884850473.

It is an arithmetic number, because the mean of its divisors is an integer number (10480357660486).

Almost surely, 2^{111220122111020} is an apocalyptic number.

111220122111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220122111020 is an abundant number, since it is smaller than the sum of its proper divisors (140308461740644).

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

111220122111020 is a wasteful number, since it uses less digits than its factorization.

111220122111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427769700449 (or 427769700447 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111220122111020 its reverse (20111221022111), we get a palindrome (131331343133131).

The spelling of 111220122111020 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-two million, one hundred eleven thousand, twenty".