1211100011120 has 80 divisors (see below), whose sum is σ = 2842288462848. Its totient is φ = 479895736320.

The previous prime is 1211100011111. The next prime is 1211100011137. The reversal of 1211100011120 is 211100011121.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 6625592 + ... + 6805928.

Almost surely, 2^{1211100011120} is an apocalyptic number.

1211100011120 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 1211100011120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1421144231424).

1211100011120 is an abundant number, since it is smaller than the sum of its proper divisors (1631188451728).

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

1211100011120 is a wasteful number, since it uses less digits than its factorization.

1211100011120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181138 (or 181132 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1211100011120 its reverse (211100011121), we get a palindrome (1422200022241).

Subtracting from 1211100011120 its reverse (211100011121), we obtain a palindrome (999999999999).

It can be divided in two parts, 121110001 and 1120, that added together give a palindrome (121111121).

The spelling of 1211100011120 in words is "one trillion, two hundred eleven billion, one hundred million, eleven thousand, one hundred twenty".