2102421023 has 6 divisors (see below), whose sum is σ = 2172429792. Its totient is φ = 2034600060.

The previous prime is 2102421011. The next prime is 2102421029. The reversal of 2102421023 is 3201242012.

It is not a de Polignac number, because 2102421023 - 2¹⁰ = 2102419999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102420992 and 2102421010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102421029) 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 5 ways as a sum of consecutive naturals, for example, 1092911 + ... + 1094832.

It is an arithmetic number, because the mean of its divisors is an integer number (362071632).

Almost surely, 2^2102421023 is an apocalyptic number.

2102421023 is a deficient number, since it is larger than the sum of its proper divisors (70008769).

2102421023 is an equidigital number, since it uses as much as digits as its factorization.

2102421023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187805 (or 2187774 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2102421023 is about 45852.1648671031. The cubic root of 2102421023 is about 1281.0710889490.

Adding to 2102421023 its reverse (3201242012), we get a palindrome (5303663035).

The spelling of 2102421023 in words is "two billion, one hundred two million, four hundred twenty-one thousand, twenty-three".