2130021023 has 4 divisors (see below), whose sum is σ = 2293868808. Its totient is φ = 1966173240.

The previous prime is 2130020987. The next prime is 2130021037. The reversal of 2130021023 is 3201200312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2130021023 - 2¹⁰ = 2130019999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130020989 and 2130021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130021043) 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, 81923873 + ... + 81923898.

It is an arithmetic number, because the mean of its divisors is an integer number (573467202).

Almost surely, 2^2130021023 is an apocalyptic number.

2130021023 is a deficient number, since it is larger than the sum of its proper divisors (163847785).

2130021023 is a wasteful number, since it uses less digits than its factorization.

2130021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163847784.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2130021023 is about 46152.1507949521. The cubic root of 2130021023 is about 1286.6525842628.

Adding to 2130021023 its reverse (3201200312), we get a palindrome (5331221335).

The spelling of 2130021023 in words is "two billion, one hundred thirty million, twenty-one thousand, twenty-three".