111553542120 has 32 divisors (see below), whose sum is σ = 334660626720. Its totient is φ = 29747611200.

The previous prime is 111553542119. The next prime is 111553542127. The reversal of 111553542120 is 21245355111.

It is a super-2 number, since 2×111553542120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (111553542127) 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, 464806306 + ... + 464806545.

It is an arithmetic number, because the mean of its divisors is an integer number (10458144585).

Almost surely, 2^111553542120 is an apocalyptic number.

111553542120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111553542120 is an abundant number, since it is smaller than the sum of its proper divisors (223107084600).

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

111553542120 is a wasteful number, since it uses less digits than its factorization.

111553542120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929612865 (or 929612861 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 111553542120 its reverse (21245355111), we get a palindrome (132798897231).

The spelling of 111553542120 in words is "one hundred eleven billion, five hundred fifty-three million, five hundred forty-two thousand, one hundred twenty".