2105421023 has 2 divisors, whose sum is σ = 2105421024. Its totient is φ = 2105421022.

The previous prime is 2105420969. The next prime is 2105421037. The reversal of 2105421023 is 3201245012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2105421023 - 2¹⁰ = 2105419999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105420986 and 2105421004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105421523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052710511 + 1052710512.

It is an arithmetic number, because the mean of its divisors is an integer number (1052710512).

Almost surely, 2^2105421023 is an apocalyptic number.

2105421023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105421023 is an equidigital number, since it uses as much as digits as its factorization.

2105421023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2105421023 is about 45884.8670369655. The cubic root of 2105421023 is about 1281.6801307280.

Adding to 2105421023 its reverse (3201245012), we get a palindrome (5306666035).

The spelling of 2105421023 in words is "two billion, one hundred five million, four hundred twenty-one thousand, twenty-three".