111120001220020 has 24 divisors (see below), whose sum is σ = 251302156605864. Its totient is φ = 41028923527296.

The previous prime is 111120001220009. The next prime is 111120001220023. The reversal of 111120001220020 is 20022100021111.

It can be written as a sum of positive squares in 4 ways, for example, as 7305625163664 + 103814376056356 = 2702892^2 + 10188934^2 .

It is a super-2 number, since 2×111120001220020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120001220023) 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, 213692309779 + ... + 213692310298.

It is an arithmetic number, because the mean of its divisors is an integer number (10470923191911).

Almost surely, 2^{111120001220020} is an apocalyptic number.

111120001220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111120001220020 is an abundant number, since it is smaller than the sum of its proper divisors (140182155385844).

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

111120001220020 is a wasteful number, since it uses less digits than its factorization.

111120001220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427384620099 (or 427384620097 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111120001220020 its reverse (20022100021111), we get a palindrome (131142101241131).

The spelling of 111120001220020 in words is "one hundred eleven trillion, one hundred twenty billion, one million, two hundred twenty thousand, twenty".