2131021023 has 8 divisors (see below), whose sum is σ = 2844423600. Its totient is φ = 1419149568.

The previous prime is 2131020977. The next prime is 2131021049. The reversal of 2131021023 is 3201201312.

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

It is not a de Polignac number, because 2131021023 - 2¹³ = 2131012831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131020993 and 2131021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131021063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379528 + ... + 385101.

It is an arithmetic number, because the mean of its divisors is an integer number (355552950).

Almost surely, 2^2131021023 is an apocalyptic number.

2131021023 is a deficient number, since it is larger than the sum of its proper divisors (713402577).

2131021023 is an equidigital number, since it uses as much as digits as its factorization.

2131021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765561.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2131021023 is about 46162.9832549847. The cubic root of 2131021023 is about 1286.8539048555.

Adding to 2131021023 its reverse (3201201312), we get a palindrome (5332222335).

The spelling of 2131021023 in words is "two billion, one hundred thirty-one million, twenty-one thousand, twenty-three".