1121120231220 has 144 divisors (see below), whose sum is σ = 3720225075840. Its totient is φ = 271029484800.

The previous prime is 1121120231213. The next prime is 1121120231239. The reversal of 1121120231220 is 221320211211.

1121120231220 is a `hidden beast` number, since 1 + 1 + 211 + 2 + 0 + 231 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1121120231193 and 1121120231202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77791 + ... + 1499430.

It is an arithmetic number, because the mean of its divisors is an integer number (25834896360).

Almost surely, 2^{1121120231220} is an apocalyptic number.

1121120231220 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 1121120231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1860112537920).

1121120231220 is an abundant number, since it is smaller than the sum of its proper divisors (2599104844620).

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

1121120231220 is a wasteful number, since it uses less digits than its factorization.

1121120231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577606 (or 1577601 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1121120231220 its reverse (221320211211), we get a palindrome (1342440442431).

The spelling of 1121120231220 in words is "one trillion, one hundred twenty-one billion, one hundred twenty million, two hundred thirty-one thousand, two hundred twenty".