2121011023 has 4 divisors (see below), whose sum is σ = 2121139648. Its totient is φ = 2120882400.

The previous prime is 2121010973. The next prime is 2121011071. The reversal of 2121011023 is 3201101212.

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 2121011023 - 2⁹ = 2121010511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121010994 and 2121011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121011623) 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 3 ways as a sum of consecutive naturals, for example, 35178 + ... + 74023.

It is an arithmetic number, because the mean of its divisors is an integer number (530284912).

Almost surely, 2^2121011023 is an apocalyptic number.

2121011023 is a deficient number, since it is larger than the sum of its proper divisors (128625).

2121011023 is a wasteful number, since it uses less digits than its factorization.

2121011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128624.

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

The square root of 2121011023 is about 46054.4354324315. The cubic root of 2121011023 is about 1284.8358378608.

Adding to 2121011023 its reverse (3201101212), we get a palindrome (5322112235).

The spelling of 2121011023 in words is "two billion, one hundred twenty-one million, eleven thousand, twenty-three".