1211000020110 has 48 divisors (see below), whose sum is σ = 3152492207280. Its totient is φ = 322534143360.

The previous prime is 1211000020103. The next prime is 1211000020121. The reversal of 1211000020110 is 110200001121.

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 = 1211000020092 and 1211000020101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8243356 + ... + 8388975.

It is an arithmetic number, because the mean of its divisors is an integer number (65676920985).

Almost surely, 2^{1211000020110} is an apocalyptic number.

1211000020110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211000020110 is an abundant number, since it is smaller than the sum of its proper divisors (1941492187170).

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

1211000020110 is a wasteful number, since it uses less digits than its factorization.

1211000020110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16633153 (or 16633150 counting only the distinct ones).

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

Adding to 1211000020110 its reverse (110200001121), we get a palindrome (1321200021231).

The spelling of 1211000020110 in words is "one trillion, two hundred eleven billion, twenty thousand, one hundred ten".