2131231321120 has 96 divisors (see below), whose sum is σ = 5507107522560. Its totient is φ = 772969482240.

The previous prime is 2131231321091. The next prime is 2131231321123. The reversal of 2131231321120 is 211231321312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2131231321091 and 2131231321100.

It is not an unprimeable number, because it can be changed into a prime (2131231321123) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 906765 + ... + 2254924.

It is an arithmetic number, because the mean of its divisors is an integer number (57365703360).

Almost surely, 2^{2131231321120} is an apocalyptic number.

2131231321120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131231321120 is an abundant number, since it is smaller than the sum of its proper divisors (3375876201440).

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

2131231321120 is a wasteful number, since it uses less digits than its factorization.

2131231321120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162098 (or 3162090 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2131231321120 its reverse (211231321312), we get a palindrome (2342462642432).

The spelling of 2131231321120 in words is "two trillion, one hundred thirty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty".