1121054220 has 288 divisors, whose sum is σ = 4045204800. Its totient is φ = 247726080.

The previous prime is 1121054219. The next prime is 1121054243. The reversal of 1121054220 is 224501211.

1121054220 is a `hidden beast` number, since 1 + 121 + 0 + 542 + 2 + 0 = 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 = 1121054193 and 1121054202.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2496556 + ... + 2497004.

It is an arithmetic number, because the mean of its divisors is an integer number (14045850).

Almost surely, 2^1121054220 is an apocalyptic number.

1121054220 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 1121054220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2022602400).

1121054220 is an abundant number, since it is smaller than the sum of its proper divisors (2924150580).

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

1121054220 is a wasteful number, since it uses less digits than its factorization.

1121054220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1121054220 is about 33482.1477805711. The cubic root of 1121054220 is about 1038.8245533774.

Adding to 1121054220 its reverse (224501211), we get a palindrome (1345555431).

The spelling of 1121054220 in words is "one billion, one hundred twenty-one million, fifty-four thousand, two hundred twenty".