111101201021020 has 24 divisors (see below), whose sum is σ = 266642882450784. Its totient is φ = 38091840350016.

The previous prime is 111101201020967. The next prime is 111101201021023. The reversal of 111101201021020 is 20120102101111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101201021023) 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, 396790003507 + ... + 396790003786.

It is an arithmetic number, because the mean of its divisors is an integer number (11110120102116).

Almost surely, 2^{111101201021020} is an apocalyptic number.

111101201021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111101201021020 is an abundant number, since it is smaller than the sum of its proper divisors (155541681429764).

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

111101201021020 is a wasteful number, since it uses less digits than its factorization.

111101201021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793580007309 (or 793580007307 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111101201021020 its reverse (20120102101111), we get a palindrome (131221303122131).

The spelling of 111101201021020 in words is "one hundred eleven trillion, one hundred one billion, two hundred one million, twenty-one thousand, twenty".