1001211111120 has 320 divisors, whose sum is σ = 3482253192960. Its totient is φ = 235830067200.

The previous prime is 1001211111053. The next prime is 1001211111137. The reversal of 1001211111120 is 211111121001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1001211111096 and 1001211111105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74327746 + ... + 74341214.

It is an arithmetic number, because the mean of its divisors is an integer number (10882041228).

Almost surely, 2^{1001211111120} is an apocalyptic number.

1001211111120 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 1001211111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741126596480).

1001211111120 is an abundant number, since it is smaller than the sum of its proper divisors (2481042081840).

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

1001211111120 is a wasteful number, since it uses less digits than its factorization.

1001211111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14294 (or 14288 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1001211111120 its reverse (211111121001), we get a palindrome (1212322232121).

The spelling of 1001211111120 in words is "one trillion, one billion, two hundred eleven million, one hundred eleven thousand, one hundred twenty".