2131231211120 has 80 divisors (see below), whose sum is σ = 5459098140000. Its totient is φ = 767319936000.

The previous prime is 2131231211107. The next prime is 2131231211143. The reversal of 2131231211120 is 211121321312.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2131231211092 and 2131231211101.

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, 11900495 + ... + 12078254.

It is an arithmetic number, because the mean of its divisors is an integer number (68238726750).

Almost surely, 2^{2131231211120} is an apocalyptic number.

2131231211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131231211120 is an abundant number, since it is smaller than the sum of its proper divisors (3327866928880).

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

2131231211120 is a wasteful number, since it uses less digits than its factorization.

2131231211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23978874 (or 23978868 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2131231211120 its reverse (211121321312), we get a palindrome (2342352532432).

The spelling of 2131231211120 in words is "two trillion, one hundred thirty-one billion, two hundred thirty-one million, two hundred eleven thousand, one hundred twenty".