1211330110120 has 128 divisors (see below), whose sum is σ = 3108346164000. Its totient is φ = 420877172736.

The previous prime is 1211330110117. The next prime is 1211330110163. The reversal of 1211330110120 is 210110331121.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 670790484324 + 540539625796 = 819018^2 + 735214^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1211330110094 and 1211330110103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82637832 + ... + 82652488.

Almost surely, 2^{1211330110120} is an apocalyptic number.

1211330110120 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 1211330110120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1554173082000).

1211330110120 is an abundant number, since it is smaller than the sum of its proper divisors (1897016053880).

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

1211330110120 is a wasteful number, since it uses less digits than its factorization.

1211330110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24047 (or 24043 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1211330110120 its reverse (210110331121), we get a palindrome (1421440441241).

The spelling of 1211330110120 in words is "one trillion, two hundred eleven billion, three hundred thirty million, one hundred ten thousand, one hundred twenty".