2101020423 has 4 divisors (see below), whose sum is σ = 2801360568. Its totient is φ = 1400680280.

The previous prime is 2101020403. The next prime is 2101020457. The reversal of 2101020423 is 3240201012.

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 2101020423 - 2¹⁴ = 2101004039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101020403) 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 3 ways as a sum of consecutive naturals, for example, 350170068 + ... + 350170073.

It is an arithmetic number, because the mean of its divisors is an integer number (700340142).

Almost surely, 2^2101020423 is an apocalyptic number.

2101020423 is a deficient number, since it is larger than the sum of its proper divisors (700340145).

2101020423 is an equidigital number, since it uses as much as digits as its factorization.

2101020423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700340144.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2101020423 is about 45836.8893250840. The cubic root of 2101020423 is about 1280.7865492472.

Adding to 2101020423 its reverse (3240201012), we get a palindrome (5341221435).

The spelling of 2101020423 in words is "two billion, one hundred one million, twenty thousand, four hundred twenty-three".