2101215423 has 4 divisors (see below), whose sum is σ = 2801620568. Its totient is φ = 1400810280.

The previous prime is 2101215421. The next prime is 2101215449. The reversal of 2101215423 is 3245121012.

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

It is not a de Polignac number, because 2101215423 - 2¹ = 2101215421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101215423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101215421) 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, 350202568 + ... + 350202573.

It is an arithmetic number, because the mean of its divisors is an integer number (700405142).

Almost surely, 2^2101215423 is an apocalyptic number.

2101215423 is a deficient number, since it is larger than the sum of its proper divisors (700405145).

2101215423 is an equidigital number, since it uses as much as digits as its factorization.

2101215423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700405144.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2101215423 is about 45839.0163834260. The cubic root of 2101215423 is about 1280.8261721606.

Adding to 2101215423 its reverse (3245121012), we get a palindrome (5346336435).

The spelling of 2101215423 in words is "two billion, one hundred one million, two hundred fifteen thousand, four hundred twenty-three".