2131231332020 has 144 divisors (see below), whose sum is σ = 5242329125712. Its totient is φ = 725655490560.

The previous prime is 2131231332011. The next prime is 2131231332037. The reversal of 2131231332020 is 202331321312.

It can be written as a sum of positive squares in 8 ways, for example, as 10439117584 + 2120792214436 = 102172^2 + 1456294^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 467270540 + ... + 467275100.

It is an arithmetic number, because the mean of its divisors is an integer number (36405063373).

Almost surely, 2^{2131231332020} is an apocalyptic number.

2131231332020 is a gapful number since it is divisible by the number (20) 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 2131231332020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2621164562856).

2131231332020 is an abundant number, since it is smaller than the sum of its proper divisors (3111097793692).

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

2131231332020 is a wasteful number, since it uses less digits than its factorization.

2131231332020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778 (or 7769 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 2131231332020 its reverse (202331321312), we get a palindrome (2333562653332).

The spelling of 2131231332020 in words is "two trillion, one hundred thirty-one billion, two hundred thirty-one million, three hundred thirty-two thousand, twenty".