2131331341220 has 48 divisors (see below), whose sum is σ = 4630302578160. Its totient is φ = 823104823296.

The previous prime is 2131331341213. The next prime is 2131331341259. The reversal of 2131331341220 is 221431331312.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 39188953444 + 2092142387776 = 197962^2 + 1446424^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2131331341220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22220084 + ... + 22315796.

It is an arithmetic number, because the mean of its divisors is an integer number (96464637045).

Almost surely, 2^{2131331341220} is an apocalyptic number.

2131331341220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131331341220 is an abundant number, since it is smaller than the sum of its proper divisors (2498971236940).

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

2131331341220 is a wasteful number, since it uses less digits than its factorization.

2131331341220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134144 (or 134142 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 2131331341220 its reverse (221431331312), we get a palindrome (2352762672532).

The spelling of 2131331341220 in words is "two trillion, one hundred thirty-one billion, three hundred thirty-one million, three hundred forty-one thousand, two hundred twenty".