2131012021 has 8 divisors (see below), whose sum is σ = 2161843200. Its totient is φ = 2100386160.

The previous prime is 2131012019. The next prime is 2131012057. The reversal of 2131012021 is 1202101312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131012021 - 2¹ = 2131012019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131011992 and 2131012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131012001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30361 + ... + 71998.

It is an arithmetic number, because the mean of its divisors is an integer number (270230400).

Almost surely, 2^2131012021 is an apocalyptic number.

It is an amenable number.

2131012021 is a deficient number, since it is larger than the sum of its proper divisors (30831179).

2131012021 is a wasteful number, since it uses less digits than its factorization.

2131012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102659.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2131012021 is about 46162.8857525177. The cubic root of 2131012021 is about 1286.8520928485.

Adding to 2131012021 its reverse (1202101312), we get a palindrome (3333113333).

The spelling of 2131012021 in words is "two billion, one hundred thirty-one million, twelve thousand, twenty-one".