112121121220 has 24 divisors (see below), whose sum is σ = 235461452184. Its totient is φ = 44847096576.

The previous prime is 112121121197. The next prime is 112121121251. The reversal of 112121121220 is 22121121211.

It can be written as a sum of positive squares in 4 ways, for example, as 29353283584 + 82767837636 = 171328^2 + 287694^2 .

It is a super-2 number, since 2×112121121220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 112121121194 and 112121121203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844914 + ... + 968566.

It is an arithmetic number, because the mean of its divisors is an integer number (9810893841).

Almost surely, 2^112121121220 is an apocalyptic number.

112121121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

112121121220 is an abundant number, since it is smaller than the sum of its proper divisors (123340330964).

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

112121121220 is a wasteful number, since it uses less digits than its factorization.

112121121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168999 (or 168997 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 112121121220 its reverse (22121121211), we get a palindrome (134242242431).

Subtracting from 112121121220 its reverse (22121121211), we obtain a palindrome (90000000009).

The spelling of 112121121220 in words is "one hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty".