1121000122220 has 144 divisors (see below), whose sum is σ = 2747571430464. Its totient is φ = 382565990400.

The previous prime is 1121000122147. The next prime is 1121000122243. The reversal of 1121000122220 is 222210001211.

It is a junction number, because it is equal to n+sod(n) for n = 1121000122195 and 1121000122204.

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, 14483825 + ... + 14561015.

It is an arithmetic number, because the mean of its divisors is an integer number (19080357156).

Almost surely, 2^{1121000122220} is an apocalyptic number.

1121000122220 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 1121000122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373785715232).

1121000122220 is an abundant number, since it is smaller than the sum of its proper divisors (1626571308244).

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

1121000122220 is a wasteful number, since it uses less digits than its factorization.

1121000122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77592 (or 77579 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1121000122220 its reverse (222210001211), we get a palindrome (1343210123431).

The spelling of 1121000122220 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-two thousand, two hundred twenty".