111522142420 has 96 divisors (see below), whose sum is σ = 256581561600. Its totient is φ = 40469535744.

The previous prime is 111522142399. The next prime is 111522142429. The reversal of 111522142420 is 24241225111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111522142429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3849951 + ... + 3878809.

It is an arithmetic number, because the mean of its divisors is an integer number (2672724600).

Almost surely, 2^111522142420 is an apocalyptic number.

111522142420 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 111522142420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128290780800).

111522142420 is an abundant number, since it is smaller than the sum of its proper divisors (145059419180).

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

111522142420 is a wasteful number, since it uses less digits than its factorization.

111522142420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29137 (or 29135 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 111522142420 its reverse (24241225111), we get a palindrome (135763367531).

The spelling of 111522142420 in words is "one hundred eleven billion, five hundred twenty-two million, one hundred forty-two thousand, four hundred twenty".