2131011021 has 8 divisors (see below), whose sum is σ = 2933004544. Its totient is φ = 1374845760.

The previous prime is 2131011007. The next prime is 2131011053. The reversal of 2131011021 is 1201101312.

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

It is not a de Polignac number, because 2131011021 - 2¹⁰ = 2131009997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131010988 and 2131011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131016021) 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, 11456956 + ... + 11457141.

It is an arithmetic number, because the mean of its divisors is an integer number (366625568).

Almost surely, 2^2131011021 is an apocalyptic number.

It is an amenable number.

2131011021 is a deficient number, since it is larger than the sum of its proper divisors (801993523).

2131011021 is a wasteful number, since it uses less digits than its factorization.

2131011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22914131.

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

The square root of 2131011021 is about 46162.8749213045. The cubic root of 2131011021 is about 1286.8518915588.

Adding to 2131011021 its reverse (1201101312), we get a palindrome (3332112333).

The spelling of 2131011021 in words is "two billion, one hundred thirty-one million, eleven thousand, twenty-one".