111201102201020 has 144 divisors (see below), whose sum is σ = 253455630035328. Its totient is φ = 40963398577920.

The previous prime is 111201102200957. The next prime is 111201102201053. The reversal of 111201102201020 is 20102201102111.

It is a junction number, because it is equal to n+sod(n) for n = 111201102200986 and 111201102201004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7479719627 + ... + 7479734493.

It is an arithmetic number, because the mean of its divisors is an integer number (1760108541912).

Almost surely, 2^{111201102201020} is an apocalyptic number.

111201102201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111201102201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126727815017664).

111201102201020 is an abundant number, since it is smaller than the sum of its proper divisors (142254527834308).

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

111201102201020 is a wasteful number, since it uses less digits than its factorization.

111201102201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19900 (or 19885 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111201102201020 its reverse (20102201102111), we get a palindrome (131303303303131).

The spelling of 111201102201020 in words is "one hundred eleven trillion, two hundred one billion, one hundred two million, two hundred one thousand, twenty".