1121000001210 has 192 divisors, whose sum is σ = 3065881927680. Its totient is φ = 283821511680.

The previous prime is 1121000001203. The next prime is 1121000001211. The reversal of 1121000001210 is 121000001211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121000001192 and 1121000001201.

It is not an unprimeable number, because it can be changed into a prime (1121000001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 183136950 + ... + 183143070.

It is an arithmetic number, because the mean of its divisors is an integer number (15968135040).

Almost surely, 2^{1121000001210} is an apocalyptic number.

1121000001210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121000001210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1532940963840).

1121000001210 is an abundant number, since it is smaller than the sum of its proper divisors (1944881926470).

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

1121000001210 is a wasteful number, since it uses less digits than its factorization.

1121000001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7493 (or 7490 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1121000001210 its reverse (121000001211), we get a palindrome (1242000002421).

Subtracting from 1121000001210 its reverse (121000001211), we obtain a palindrome (999999999999).

The spelling of 1121000001210 in words is "one trillion, one hundred twenty-one billion, one thousand, two hundred ten".