1211211131120 has 20 divisors (see below), whose sum is σ = 2816065880040. Its totient is φ = 484484452416.

The previous prime is 1211211130963. The next prime is 1211211131191. The reversal of 1211211131120 is 211311121121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7570069490 + ... + 7570069649.

It is an arithmetic number, because the mean of its divisors is an integer number (140803294002).

Almost surely, 2^{1211211131120} is an apocalyptic number.

1211211131120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211211131120 is an abundant number, since it is smaller than the sum of its proper divisors (1604854748920).

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

1211211131120 is a wasteful number, since it uses less digits than its factorization.

1211211131120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15140139152 (or 15140139146 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1211211131120 its reverse (211311121121), we get a palindrome (1422522252241).

Subtracting from 1211211131120 its reverse (211311121121), we obtain a palindrome (999900009999).

The spelling of 1211211131120 in words is "one trillion, two hundred eleven billion, two hundred eleven million, one hundred thirty-one thousand, one hundred twenty".