2131010020 has 12 divisors (see below), whose sum is σ = 4475121084. Its totient is φ = 852404000.

The previous prime is 2131009997. The next prime is 2131010023. The reversal of 2131010020 is 200101312.

It can be written as a sum of positive squares in 2 ways, for example, as 481188096 + 1649821924 = 21936^2 + 40618^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2131009979 and 2131010006.

It is not an unprimeable number, because it can be changed into a prime (2131010023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53275231 + ... + 53275270.

It is an arithmetic number, because the mean of its divisors is an integer number (372926757).

Almost surely, 2^2131010020 is an apocalyptic number.

2131010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131010020 is an abundant number, since it is smaller than the sum of its proper divisors (2344111064).

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

2131010020 is a wasteful number, since it uses less digits than its factorization.

2131010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106550510 (or 106550508 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2131010020 is about 46162.8640792575. The cubic root of 2131010020 is about 1286.8516900677.

Adding to 2131010020 its reverse (200101312), we get a palindrome (2331111332).

The spelling of 2131010020 in words is "two billion, one hundred thirty-one million, ten thousand, twenty".