2031231101020 has 144 divisors (see below), whose sum is σ = 4780622288736. Its totient is φ = 718893760000.

The previous prime is 2031231100991. The next prime is 2031231101023. The reversal of 2031231101020 is 201011321302.

It is a super-3 number, since 3×2031231101020³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2031231100985 and 2031231101003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031231101023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77334690 + ... + 77360950.

It is an arithmetic number, because the mean of its divisors is an integer number (33198765894).

Almost surely, 2^{2031231101020} is an apocalyptic number.

2031231101020 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 2031231101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2390311144368).

2031231101020 is an abundant number, since it is smaller than the sum of its proper divisors (2749391187716).

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

2031231101020 is a wasteful number, since it uses less digits than its factorization.

2031231101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26500 (or 26439 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2031231101020 its reverse (201011321302), we get a palindrome (2232242422322).

The spelling of 2031231101020 in words is "two trillion, thirty-one billion, two hundred thirty-one million, one hundred one thousand, twenty".